Official Paper

RRB ALP Electronics Mechanic 21 Jan 2019 Official Paper (Shift 3) (Previous Year Paper)

175 questions · 150 minutes · with answers · free

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Part A (100 questions)

1

Two resistors, one of 10 Ω and the other of 15 Ω, are connected in parallel. This combination is connected in series with a 24 Ω resistor and a 12 V battery. The current in the 15 Ω resistor is:

  1. ((a))

    0.40 A

  2. ((b))

    0.24 A

  3. ((c))

    0.12 A

  4. ((d))

    0.16 A

Show Answer
Answer: ((a))

0.40 A

2

Which type of pencil has the hardest graphite lead?

  1. ((a))

    3H

  2. ((b))

    2H

  3. ((c))

    9H

  4. ((d))

    HB

Show Answer
Answer: ((a))

3H

3

The weight of an object on the Earth is 150 N. Its weight on moon will be:

  1. ((a))

    75 N

  2. ((b))

    50 N

  3. ((c))

    150 N

  4. ((d))

    25 N

Show Answer
Answer: ((a))

75 N

4

A ‘compass’ is used to draw:

  1. ((a))

    Circle

  2. ((b))

    Rectangle

  3. ((c))

    Triangle

  4. ((d))

    Straight line

Show Answer
Answer: ((a))

Circle

5

An object is accelerating at 5 m/s2 from its rest position. The velocity of this object after 5 s is:

  1. ((a))

    15 m/s

  2. ((b))

    20 m/s

  3. ((c))

    5 m/s

  4. ((d))

    25 m/s

Show Answer
Answer: ((a))

15 m/s

6

The work to be done to increase the speed of a 0.5 kg ball from 4 m/s to 8 m/s is:

  1. ((a))

    8 J

  2. ((b))

    12 J

  3. ((c))

    16 J

  4. ((d))

    4 J

Show Answer
Answer: ((a))

8 J

7

Which of these is NOT a type of string musical instrument?

  1. ((a))

    Bass

  2. ((b))

    Violin

  3. ((c))

    Tuba

  4. ((d))

    Cello

Show Answer
Answer: ((a))

Bass

8

A/An _______ is the software that manages all of a computer’s processes and allows programs and applications to run.

  1. ((a))

    spam

  2. ((b))

    malware

  3. ((c))

    modem

  4. ((d))

    operating system

Show Answer
Answer: ((a))

spam

9

A cylindrical wire of length L and radius r has a resistance R. The resistance of another wire of the same material but of half its length and twice its radius is given by:

  1. ((a))

    R

  2. ((b))

    R/2

  3. ((c))

    R/4

  4. ((d))

    R/8

Show Answer
Answer: ((a))

R

10

Two resistors, each of 20 ohms, are connected in parallel and this combination is connected across a 40 V supply voltage.

Find the resistance in the circuit.

  1. ((a))

    40 ohm

  2. ((b))

    10 ohm

  3. ((c))

    25 ohm

  4. ((d))

    20 ohm

Show Answer
Answer: ((a))

40 ohm

11

Our electricity bills carry the energy consumption, expressed in units of _______.

  1. ((a))

    KVA

  2. ((b))

    kW

  3. ((c))

    kWh

  4. ((d))

    KJ

Show Answer
Answer: ((a))

KVA

12

A component that adds to a software program’s functionality is called as ______

  1. ((a))

    Plug-in

  2. ((b))

    Processor

  3. ((c))

    Modem

  4. ((d))

    Server

Show Answer
Answer: ((a))

Plug-in

13

A block of wood floats in water with 30% of its volume above water (density 103 kg/m3). The density of wood (in kg/m3) is:

  1. ((a))

    6 × 103

  2. ((b))

    5 × 102

  3. ((c))

    7 × 102

  4. ((d))

    3 × 102

Show Answer
Answer: ((a))

6 × 103

14

Bio-gas is an excellent fuel as it contains up to ______% methane.

  1. ((a))

    85

  2. ((b))

    70

  3. ((c))

    50

  4. ((d))

    80

Show Answer
Answer: ((a))

85

15

Who was appointed as the Chief Justice of India on 03.10.2018?

  1. ((a))

    Mr. N.V. Ramana

  2. ((b))

    Mr. Ranjan Gogoi

  3. ((c))

    Mr. Kurian Joseph

  4. ((d))

    Mr. Arjan Kumar Sikri

Show Answer
Answer: ((a))

Mr. N.V. Ramana

16

The thanksgiving festival of Pongal is primarily celebrated in which state of India?

  1. ((a))

    Tamilnadu

  2. ((b))

    Rajasthan

  3. ((c))

    Maharashtra

  4. ((d))

    Uttar Pradesh

Show Answer
Answer: ((a))

Tamilnadu

17

What is the power dissipated in a 5-ohm resistor carrying 2 A current?

  1. ((a))

    10 W

  2. ((b))

    0.6 W

  3. ((c))

    2.5 W

  4. ((d))

    20 W

Show Answer
Answer: ((a))

10 W

18

Which of these is NOT a novel written by Premchand?

  1. ((a))

    Godaan

  2. ((b))

    Gaban

  3. ((c))

    Nirmala

  4. ((d))

    Deepshikha

Show Answer
Answer: ((a))

Godaan

19

The idea of a Constituent Assembly was given by:

  1. ((a))

    Dr. Rajendra Prasad

  2. ((b))

    Maulana Abul Kalam Azad

  3. ((c))

    M.N Roy

  4. ((d))

    B.R. Ambedkar

Show Answer
Answer: ((a))

Dr. Rajendra Prasad

20

A ball of 200 g is thrown vertically upward with a speed of 20 m/s. The momentum of the ball at the highest point of its path is (take g = 10 m/s2):

  1. ((a))

    200 kgm/s

  2. ((b))

    100 kgm/s

  3. ((c))

    40 kgm/s

  4. ((d))

    0

Show Answer
Answer: ((a))

200 kgm/s

21

Increasing the pressure on an object ______ the volume of the object and therefore ______ its density.

  1. ((a))

    increases, increases

  2. ((b))

    increases, decreases

  3. ((c))

    decreases, increases

  4. ((d))

    decreases, decreases

Show Answer
Answer: ((a))

increases, increases

22

The construction of the “Sanchi Stupa” was commissioned by which Mauryan Emperor?

  1. ((a))

    Chandragupta Maurya

  2. ((b))

    Bindusara

  3. ((c))

    Ashoka

  4. ((d))

    Kautilya

Show Answer
Answer: ((a))

Chandragupta Maurya

23

If we double the length of a copper wire keeping the cross-sectional area constant, its resistance increases by _______ times.

  1. ((a))

    Four

  2. ((b))

    One

  3. ((c))

    Three

  4. ((d))

    Two

Show Answer
Answer: ((a))

Four

24

Identify the insulator from the below having high resistivity.

  1. ((a))

    Glass

  2. ((b))

    Diamond

  3. ((c))

    Hard rubber

  4. ((d))

    Dry paper

Show Answer
Answer: ((a))

Glass

25

Which of the following organisations prepares a Red List of Threatened Species?

  1. ((a))

    RPPO

  2. ((b))

    OIE

  3. ((c))

    WWF

  4. ((d))

    IUCN

Show Answer
Answer: ((a))

RPPO

26

A source of voltage V maintains a current I in a circuit. The power (P) input to the circuit by the source is given by:

  1. ((a))

    P = V I

  2. ((b))

    P = V/I

  3. ((c))

    P = I/V

  4. ((d))

    P = 1/(V I)

Show Answer
Answer: ((a))

P = V I

27

The Celsius temperature (tC) and the Fahrenheit temperature (tF) are related as:

  1. ((a))

    tF = (5/9) tC + 32

  2. ((b))

    tF = (9/5) tC

  3. ((c))

    tF = (9/5) tC + 32

  4. ((d))

    tF = (5/9) tC

Show Answer
Answer: ((a))

tF = (5/9) tC + 32

28

Who invented the World Wide Web?

  1. ((a))

    Tim Berner-Lee

  2. ((b))

    Robert E. Kahn

  3. ((c))

    Vint Cerf

  4. ((d))

    Antonio Meucci

Show Answer
Answer: ((a))

Tim Berner-Lee

29

A boy weighing 50 kg runs up a staircase of 40 steps, each of 16 height cm, in 10 s. Calculate his power. (Take g = 10 m/s2)

  1. ((a))

    480 W

  2. ((b))

    320 W

  3. ((c))

    120 W

  4. ((d))

    80 W

Show Answer
Answer: ((a))

480 W

30

Laho dance belongs to the state of  _________ in India.

  1. ((a))

    Meghalaya

  2. ((b))

    Rajasthan

  3. ((c))

    Orissa

  4. ((d))

    Andhra Pradesh

Show Answer
Answer: ((a))

Meghalaya

31

Which country did India beat to win the Under19 Cricket Asia Cup 2018?

  1. ((a))

    Sri Lanka

  2. ((b))

    Afghanistan

  3. ((c))

    Pakistan

  4. ((d))

    Bangladesh

Show Answer
Answer: ((a))

Sri Lanka

32

Which of the following quantities does not have dimensions?

  1. ((a))

    Frequency

  2. ((b))

    Volume

  3. ((c))

    Relative permeability

  4. ((d))

    Force

Show Answer
Answer: ((a))

Frequency

33

The sum of the present ages of a father and a son is 45 year. 5 year ago, the ratio of their ages was 6 : 1. Find the current age of the father. 

  1. ((a))

    40 year

  2. ((b))

    30 year

  3. ((c))

    25 year

  4. ((d))

    35 year

Show Answer
Answer: ((a))

40 year

34

Find the odd word from the given alternatives

  1. ((a))

    Carom board

  2. ((b))

    Wheel

  3. ((c))

    Coin

  4. ((d))

    Hula hoop

Show Answer
Answer: ((a))

Carom board

35

Find the odd set of letter from the given alternatives.

  1. ((a))

    JLN

  2. ((b))

    MNO

  3. ((c))

    RTV

  4. ((d))

    CEG

Show Answer
Answer: ((a))

JLN

36

In the question, two statements are given, followed by two conclusions, I and II. You have to consider the statements to be true even if they seem to be at variance with commonly known facts. You have to decide which of the given conclusions, if any, follow(s) from the given statements.

Statement 1: All stones are cyclones

Statement 2: All cyclones are tornadoes

Conclusion I: Some tornadoes are stones

Conclusion II: Some cyclones are stones

  1. ((a))

    Only conclusion II follows

  2. ((b))

    Only conclusion I follows

  3. ((c))

    Neither I nor II follows

  4. ((d))

    Both I and II follow

Show Answer
Answer: ((a))

Only conclusion II follows

37

What is the minimum number of lines required to make the given image?

  1. ((a))

    11

  2. ((b))

    10

  3. ((c))

    9

  4. ((d))

    12

Show Answer
Answer: ((a))

11

38

A statement/group of statements is given followed by some conclusion. Choose the conclusion that logically follows from the given statements.

Statement: All hardworking worker in the factory have been promoted in the last five year:

  1. ((a))

    Some worker who were promoted in the last five year are hardworking

  2. ((b))

    There are no worker in the factory who are not hardworking

  3. ((c))

    Hardworking is the only criteria for promotion

  4. ((d))

    After promotion, some worker stopped working hard

Show Answer
Answer: ((a))

Some worker who were promoted in the last five year are hardworking

39

Two cows G and H are grazing in a field. They start from the same point. G moves 1.5 km South, then turns East and moves 2.5 km, then turns to its right and moves 3.5 km. Meanwhile H has moved 2.5 km East. Where is H with respect to G.

  1. ((a))

    H is 2 km South of G

  2. ((b))

    H is 5 km North of G

  3. ((c))

    H is 5 km South of G

  4. ((d))

    H is 2 km North of G

Show Answer
Answer: ((a))

H is 2 km South of G

40

A jogger jogs 1 km East, then turn North and jogs 4 km, then turns West and jogs 6 km, then turns to his left and jogs 4 km. Where is he now with reference to his starting position?

  1. ((a))

    5 km West

  2. ((b))

    7 km West

  3. ((c))

    7 km East

  4. ((d))

    5 km East

Show Answer
Answer: ((a))

5 km West

41

Choose the figure that is different from the rest.

  1. ((a))

  2. ((b))

  3. ((c))

  4. ((d))

Show Answer
Answer: ((a))

42

If G + H means G is daughter of H; G - H means G is father-in-law of H; and G * H means G is husband of H; then which of the following shows that O is the sister L?

  1. ((a))

    O * N - M + L

  2. ((b))

    O - N * M + L

  3. ((c))

    O + M - N * L

  4. ((d))

    O - N + M * L

Show Answer
Answer: ((a))

O * N - M + L

43

A series is given, with one number missing. Choose the correct alternative from the given ones that will complete the series.

7.4, 8.7, 10.0, 11.3, ?, 13.9

  1. ((a))

    11.9

  2. ((b))

    12.3

  3. ((c))

    11.7

  4. ((d))

    12.6

Show Answer
Answer: ((a))

11.9

44

Which two signs should be interchanged to correct the given equation?

15 ÷ 3 + 2 × 10 - 6 = 14

  1. ((a))

    ÷ and -

  2. ((b))

    ÷ and +

  3. ((c))
    • and ×
  4. ((d))
    • and -
Show Answer
Answer: ((a))

÷ and -

45

Select the word that is related to the third word in the same way as the second word is related to the first word.

Walnut : shell : : Banana : ?

  1. ((a))

    Peel

  2. ((b))

    Green

  3. ((c))

    Fruit

  4. ((d))

    Ripe

Show Answer
Answer: ((a))

Peel

46

A series is given, with one term missing. Choose the correct alternative from the given ones that will complete the series.

TTTTTTO, TTTTTOT, TTTTOTT, TTTOTTT

  1. ((a))

    TTTOTTTT

  2. ((b))

    TTTOTTTO

  3. ((c))

    TTOTTT

  4. ((d))

    TTOTTTT

Show Answer
Answer: ((a))

TTTOTTTT

47

What was the day of the week on January 26, 1989?

  1. ((a))

    Tuesday

  2. ((b))

    Thursday

  3. ((c))

    Sunday

  4. ((d))

    Monday

Show Answer
Answer: ((a))

Tuesday

48

Read the question below followed by two statements. Study them and decide which statement(s) is/are sufficient to answer the question.

Question: What was the revenue of the zoo on a certain day?

Statements:

I) 120 person visited the zoo on that certain day.

II) A discount of 25% on ticket price was offered on that certain day.

  1. ((a))

    Neither statement I nor II is sufficient

  2. ((b))

    Statement I alone is sufficient while II alone is not sufficient

  3. ((c))

    Statement II alone is sufficient while I alone is not sufficient

  4. ((d))

    Either statement I or II is sufficient

Show Answer
Answer: ((a))

Neither statement I nor II is sufficient

49

Which of the following Venn diagrams best represents the relationship between women, mother, and doctor?

  1. ((a))

  2. ((b))

  3. ((c))

  4. ((d))

Show Answer
Answer: ((a))

50

In the question, two statements are given, followed by three conclusions, I, II and III. You have to consider the statements to be true even if they seem to be at variance from commonly known facts. You have to decide which of the given conclusions, if any, follow(s) from the given statements.

Statement 1: All bamboo are tall.

Statement 2: All tall are grass.

Conclusion I: Some grass are bamboo.

Conclusion II: Some tall are bamboo.

Conclusion III: Some grass are tall.

  1. ((a))

    All conclusions I, II and III follow

  2. ((b))

    Only conclusions I and III follow

  3. ((c))

    Only conclusions II and III follow

  4. ((d))

    Only conclusions I and II follow

Show Answer
Answer: ((a))

All conclusions I, II and III follow

51

If C% D means C is the wife of D; C & D means C is the father of D; and If C DmeansCisthedaughterofD,thenwhatwouldX D means C is the daughter of D, then what would X Y % W & Z mean if W has only one daughter?

  1. ((a))

    X is the son of Z

  2. ((b))

    Z is the sister of X

  3. ((c))

    Z is the sister of the mother of X

  4. ((d))

    X is the sister of Z

Show Answer
Answer: ((a))

X is the son of Z

52

In a certain code language, 512 means ‘steel makes tower’, 175 means ‘brick makes tower’, and 327 means ‘brick and steel’. Find the code for ‘and’.

  1. ((a))

    3

  2. ((b))

    1

  3. ((c))

    2

  4. ((d))

    7

Show Answer
Answer: ((a))

3

53

In the following figure, square represents Asians, triangle represents writers, circle represents fathers and rectangle represents actors. Which set of letters represents actors who are writers?

  1. ((a))

    GD

  2. ((b))

    GF

  3. ((c))

    CEG

  4. ((d))

    HGF

Show Answer
Answer: ((a))

GD

54

M, N, O and P are sitting around a round table? M does not want to sit next to P. N is to the right of P. Which statement of the below is false?

  1. ((a))

    O is to the right of P

  2. ((b))

    M is facing P

  3. ((c))

    M is to the right of N

  4. ((d))

    O is facing N

Show Answer
Answer: ((a))

O is to the right of P

55

Given below is a statement followed by two assumptions numbered I and II. You have to decide which of the assumptions is/are implicit in the statement.

Statement: College students should work during summer holidays to improve their chances of getting a job.

Assumption I: Not all college students want a job.

Assumption II: There are enough summer jobs for most college students.

  1. ((a))

    Both I and II are implicit

  2. ((b))

    Only assumption I is implicit

  3. ((c))

    Neither I nor II is implicit

  4. ((d))

    Only assumption II is implicit

Show Answer
Answer: ((a))

Both I and II are implicit

56

In a certain code language, ‘+’ represents ‘×’, ‘-‘ represents ‘+’, ‘×’ represents ‘÷’ and ‘÷’ represents ‘-‘, calculate the answer of the following equation.

8 + 3 × 4 - 2 = ?

  1. ((a))

    12

  2. ((b))

    6

  3. ((c))

    10

  4. ((d))

    8

Show Answer
Answer: ((a))

12

57

In a certain code language, if STUDIO is coded as QRSBGM, then how will RAW be coded in that language?

  1. ((a))

    PYU

  2. ((b))

    WXR

  3. ((c))

    UKN

  4. ((d))

    TGB

Show Answer
Answer: ((a))

PYU

58

Select the number that is related to the third number in the same way as the second number is related to the first number

2/5 : 0.4 : : 1/200 : ?

  1. ((a))

    0.005

  2. ((b))

    0.05

  3. ((c))

    0.2

  4. ((d))

    0.002

Show Answer
Answer: ((a))

0.005

59

Choose the figure that is different from the rest.

  1. ((a))

  2. ((b))

  3. ((c))

  4. ((d))

Show Answer
Answer: ((a))

60

The length and breadth of a rectangle is 6 cms and 8 cms respectively. Then what will be the area of a square whose side is equal to the length of the diagonal of this rectangle.

  1. ((a))

    100 cm2

  2. ((b))

    92 cm2

  3. ((c))

    96 cm2

  4. ((d))

    196 cm2

Show Answer
Answer: ((a))

100 cm2

61

The resulting value of 0.5 ÷ 12.5 + 0.25 × 0.05 – 0.0125 is:

  1. ((a))

    0.04

  2. ((b))

    0.5

  3. ((c))

    0.4

  4. ((d))

    0.05

Show Answer
Answer: ((a))

0.04

62

10% of 1000% of 100 = ?

  1. ((a))

    110

  2. ((b))

    100

  3. ((c))

    102

  4. ((d))

    105

Show Answer
Answer: ((a))

110

63

What is the square root of 0.000225?

  1. ((a))

    0.0125

  2. ((b))

    0.0015

  3. ((c))

    0.005

  4. ((d))

    0.015

Show Answer
Answer: ((a))

0.0125

64

An article was marked for Rs. 1000. Had a discount of 16% was offered, a profit of 5% would have been made. What is the cost price of the article?

  1. ((a))

    Rs. 750

  2. ((b))

    Rs. 800

  3. ((c))

    Rs. 880

  4. ((d))

    Rs. 840

Show Answer
Answer: ((a))

Rs. 750

65

Two trains start moving towards each other when they are 2000 meter apart. First train travels at the speed of 20 m/s and the other one at 30 m/s. After how many seconds do they meet?

  1. ((a))

    45

  2. ((b))

    40

  3. ((c))

    35

  4. ((d))

    50

Show Answer
Answer: ((a))

45

66

What is the digit that will come at the unit’s place in the result of (423)423 × (1237)28 ?

  1. ((a))

    9

  2. ((b))

    7

  3. ((c))

    1

  4. ((d))

    3

Show Answer
Answer: ((a))

9

67

Pipes P and Q fill a cistern in 12 minutes when operated together, Q and R fill it in 20 minutes when operated together and P and R fill it in 15 minutes when operated together. In how many minutes can all 3 pipes fill the cistern if operated together?

  1. ((a))

    10 minutes

  2. ((b))

    2 minutes

  3. ((c))

    4 minutes

  4. ((d))

    3 minutes

Show Answer
Answer: ((a))

10 minutes

68

Pipes A and pipe B can fill a tank at rate of 30 m3/hr and 40 m3/hr respectively. Together they fill the tank in 4 hours. Find the volume of the tank.

  1. ((a))

    180 m3

  2. ((b))

    280 m3

  3. ((c))

    360 m3

  4. ((d))

    200 m3

Show Answer
Answer: ((a))

180 m3

69

If a person goes from his house to office walking at 80% of his usual speed, then he is late by 18 minutes to reach the office. What is the usual time taken by him to cover that same distance with his usual speed?

  1. ((a))

    78 minutes

  2. ((b))

    72 minutes

  3. ((c))

    75 minutes

  4. ((d))

    70 minutes

Show Answer
Answer: ((a))

78 minutes

70

X jogs a total of 7.5 km in a day. He jogged 25/6 km in the morning. How much did he jog in the Evening?

  1. ((a))

    5/3 Km

  2. ((b))

    8/3 Km

  3. ((c))

    11/3 Km

  4. ((d))

    10/3 Km

Show Answer
Answer: ((a))

5/3 Km

71

What will be the distance covered by a bus moving with a speed of 72 km/h in 5 seconds?

  1. ((a))

    50 m

  2. ((b))

    200 m

  3. ((c))

    100 m

  4. ((d))

    400 m

Show Answer
Answer: ((a))

50 m

72

What will be A’s share of profit if the total profit is Rupees 1000 and is to be divided amongst A, B and C in the ratio 3 : 2 : 5?

  1. ((a))

    Rs. 250

  2. ((b))

    Rs. 300

  3. ((c))

    Rs. 500

  4. ((d))

    Rs. 200

Show Answer
Answer: ((a))

Rs. 250

73

An object travels distance of first 30 m in 5 s and the next distance of 30 m in 3 s. The average speed of the object is:

  1. ((a))

    6.5 m/s

  2. ((b))

    9.0 m/s

  3. ((c))

    4.5 m/s

  4. ((d))

    7.5 m/s

Show Answer
Answer: ((a))

6.5 m/s

74

At what price should a computer be sold so as to get a profit of 25% when its cost price is Rs. 18000?

  1. ((a))

    Rs. 20500

  2. ((b))

    Rs. 21000

  3. ((c))

    Rs. 23000

  4. ((d))

    Rs. 22500

Show Answer
Answer: ((a))

Rs. 20500

75

A sum of Rs. 10000 was deposited in a bank that offer 20% annual compound interest. What will the amount be in the bank after 2 year?

  1. ((a))

    Rs. 12000

  2. ((b))

    Rs. 8000

  3. ((c))

    Rs. 14400

  4. ((d))

    Rs. 13600

Show Answer
Answer: ((a))

Rs. 12000

76

What is the HCF of 275 and 308?

  1. ((a))

    17

  2. ((b))

    19

  3. ((c))

    15

  4. ((d))

    11

Show Answer
Answer: ((a))

17

77

What is the side of a cube if the total surface area is 96 sq. cm?

  1. ((a))

    3 cm

  2. ((b))

    5 cm

  3. ((c))

    4 cm

  4. ((d))

    2 cm

Show Answer
Answer: ((a))

3 cm

78

The sum of a number and 16 times its reciprocal is 10. The number is:

  1. ((a))

    5

  2. ((b))

    6

  3. ((c))

    8

  4. ((d))

    7

Show Answer
Answer: ((a))

5

79

A sum of money invested at a compound interest amounts to 800 in 2 year and 840 in 3 year. The rate of interest is:

  1. ((a))

    5%

  2. ((b))

    7%

  3. ((c))

    6%

  4. ((d))

    4%

Show Answer
Answer: ((a))

5%

80

The number 800 is divided in 2 parts such that one part is 9/7 times the other. The larger part is:

  1. ((a))

    480

  2. ((b))

    500

  3. ((c))

    450

  4. ((d))

    510

Show Answer
Answer: ((a))

480

81

What is the distance between the points (-2, 4) and (4, 4)?

  1. ((a))

    8 units

  2. ((b))

    4 units

  3. ((c))

    2 units

  4. ((d))

    6 units

Show Answer
Answer: ((a))

8 units

82

The least number consisting of five digits and that is divisible by 97 is x. What is the sum of digits of x?

  1. ((a))

    15

  2. ((b))

    13

  3. ((c))

    16

  4. ((d))

    17

Show Answer
Answer: ((a))

15

83

ΔDEF is similar to ΔPQR. If the ratio of semi-perimeter of ΔDEF and ΔPQR is 4 : 5 and if PQ = 15cm, then the length of DE is:

  1. ((a))

    12 cm

  2. ((b))

    10 cm

  3. ((c))

    20 cm

  4. ((d))

    8 cm

Show Answer
Answer: ((a))

12 cm

84

The median of 2, 9, 11, 7, 3, 4, 8, 5, 3, 6 is:

  1. ((a))

    3.5

  2. ((b))

    5

  3. ((c))

    5.5

  4. ((d))

    4

Show Answer
Answer: ((a))

3.5

85

An object starts from rest at x = 0 m and t = 0 s. It moves with a constant acceleration of 3 m/s2 along x axis. What is its average velocity between time duration of 2 s and 4 s?

  1. ((a))

    3 m/s

  2. ((b))

    6 m/s

  3. ((c))

    9 m/s

  4. ((d))

    12 m/s

Show Answer
Answer: ((a))

3 m/s

86

Where is the "title block" usually made?

  1. ((a))

    on the upper right hand corner of the drawing sheet

  2. ((b))

    lower right corner of the drawing sheet

  3. ((c))

    on the upper left corner of the drawing sheet

  4. ((d))

    center on the drawing sheet

Show Answer
Answer: ((a))

on the upper right hand corner of the drawing sheet

87

In the first angle projection:

  1. ((a))

    Object lies between observer and plane of projection

  2. ((b))

    Object lies in the third quadrant

  3. ((c))

    The plane of the projection lies between the object and the observer

  4. ((d))

    Object lies in the fourth quadrant

Show Answer
Answer: ((a))

Object lies between observer and plane of projection

88

A black surface absorbs ________ as compared to a white surface, under identical conditions.

  1. ((a))

    same heat

  2. ((b))

    negligible heat

  3. ((c))

    more heat

  4. ((d))

    lesser heat

Show Answer
Answer: ((a))

same heat

89

Identify the metal having the lowest thermal conductivity.

  1. ((a))

    Copper

  2. ((b))

    Mercury

  3. ((c))

    Aluminium

  4. ((d))

    Silver

Show Answer
Answer: ((a))

Copper

90

Identify the material, having high thermal conductivity.

  1. ((a))

    Wood

  2. ((b))

    Water

  3. ((c))

    Ice

  4. ((d))

    Insulating brick

Show Answer
Answer: ((a))

Wood

91

In a Class 2 lever, effort and load move in the:

  1. ((a))

    same direction

  2. ((b))

    the movement depends on the load

  3. ((c))

    opposite direction

  4. ((d))

    perpendicular direction

Show Answer
Answer: ((a))

same direction

92

How much heat should be transferred to the 100 g of an edible oil to raise its temperature by 20°C? (Specific heat of oil 1965 Jkg−1K−1)

  1. ((a))

    4.31 kJ

  2. ((b))

    2.70 kJ

  3. ((c))

    1.32 kJ

  4. ((d))

    3.93 kJ

Show Answer
Answer: ((a))

4.31 kJ

93

If we compare the effort arm length with the load arm length in a Class 2 lever, _______.

  1. ((a))

    effort arm length is always = load arm length

  2. ((b))

    effort arm length can be greater than, equal to or less than the length of the load arm

  3. ((c))

    effort arm length is always > load arm length

  4. ((d))

    effort arm length is always < load arm length

Show Answer
Answer: ((a))

effort arm length is always = load arm length

94

A pair of plier and scissor are together considered as a _______ Class 1 lever.

  1. ((a))

    triple

  2. ((b))

    single

  3. ((c))

    double

  4. ((d))

    simple

Show Answer
Answer: ((a))

triple

95

If we compare the effort arm length with the load arm length in a class 1 lever, ________

  1. ((a))

    effort arm length is always < load arm length

  2. ((b))

    effort arm length is always = load arm length

  3. ((c))

    effort arm length is always > load arm length

  4. ((d))

    effort arm length can be greater than, equal to or less than the length of the load arm

Show Answer
Answer: ((a))

effort arm length is always < load arm length

96

Standing up and supporting the lower back with hands, then gently arching back and holding this posture for some time is called as:

  1. ((a))

    Finger fan

  2. ((b))

    Back arching

  3. ((c))

    Wrist stretch

  4. ((d))

    Pectoral stretch

Show Answer
Answer: ((a))

Finger fan

97

A sheet of styrofoam of thickness 2 cm and area 0.1 m2 has a temperature difference of 30°C between its inner and outer surfaces. Considering thermal conductivity as 0.01 J/s m K, the rate of heat flow through the sheet is:

  1. ((a))

    3.0 J/s

  2. ((b))

    2.0 J/s

  3. ((c))

    1.0 J/s

  4. ((d))

    1.5 J/s

Show Answer
Answer: ((a))

3.0 J/s

98

The view of an object produced on a vertical plane is referred to as:

  1. ((a))

    Right hand side view

  2. ((b))

    Top view

  3. ((c))

    Front view

  4. ((d))

    Left hand side view

Show Answer
Answer: ((a))

Right hand side view

99

The specific heat capacity of a substance is defined by:

  1. ((a))

    m(ΔQ/ΔT)

  2. ((b))

    m(ΔT/ΔQ)

  3. ((c))

    (1/m)(ΔQ/ΔT)

  4. ((d))

    (1/m)(ΔT/ΔQ)

Show Answer
Answer: ((a))

m(ΔQ/ΔT)

100

Identify the material having the lowest coefficient of linear expansion.

  1. ((a))

    Brass

  2. ((b))

    Iron

  3. ((c))

    Copper

  4. ((d))

    Lead

Show Answer
Answer: ((a))

Brass

Part B (75 questions)

101

In the context of cables, FRC stands for:

  1. ((a))

    Full Rolling Cable

  2. ((b))

    Fat Ribbon Cable

  3. ((c))

    Fast Reeling Cable

  4. ((d))

    Flat Ribbon Cable

Show Answer
Answer: ((a))

Full Rolling Cable

102

What is the use of an RTD?

  1. ((a))

    Measuring temperature

  2. ((b))

    Measuring pressure

  3. ((c))

    Measuring humidity

  4. ((d))

    Measuring position

Show Answer
Answer: ((a))

Measuring temperature

103

Which of the following shows the proper biasing of a PNP transistor?

  1. ((a))

    base and emitter - forward bias; collector and emitter - reverse bias

  2. ((b))

    base and emitter - forward bias; collector and emitter - forward bias

  3. ((c))

    base and emitter - reverse bias; collector and emitter - forward bias

  4. ((d))

    base and emitter - reverse bias; collector and emitter - reverse bias

Show Answer
Answer: ((a))

base and emitter - forward bias; collector and emitter - reverse bias

104

In an op-amp, the input impedance is _______ and the output impedance is _______.

  1. ((a))

    high; high

  2. ((b))

    low; low

  3. ((c))

    low; high

  4. ((d))

    high; low

Show Answer
Answer: ((a))

high; high

105

In an amplifier with a positive feedback circuit, gain:

  1. ((a))

    Decreases

  2. ((b))

    remains constant

  3. ((c))

    Increases

  4. ((d))

    first increases and then decreases

Show Answer
Answer: ((a))

Decreases

106

A full-wave bridge rectifier consists of:

  1. ((a))

    one diode

  2. ((b))

    two diodes

  3. ((c))

    three diodes

  4. ((d))

    four diodes

Show Answer
Answer: ((a))

one diode

107

A circuit that changes a code into a set of signals is called

  1. ((a))

    Encoder

  2. ((b))

    multiplexer

  3. ((c))

    Decoder

  4. ((d))

    Selector

Show Answer
Answer: ((a))

Encoder

108

The output impedance of a MOSFET is:

  1. ((a))

    Medium impedance

  2. ((b))

    Low impedance

  3. ((c))

    Extreme high impedance

  4. ((d))

    High impedance

Show Answer
Answer: ((a))

Medium impedance

109

The waveform in a DSO is stored in _______ form.

  1. ((a))

    Digital

  2. ((b))

    Expanded

  3. ((c))

    Analog

  4. ((d))

    Mixed

Show Answer
Answer: ((a))

Digital

110

Which of the following devices requires a battery?

  1. ((a))

    Step-up chopper

  2. ((b))

    stabilizer

  3. ((c))

    Step-down chopper

  4. ((d))

    UPS

Show Answer
Answer: ((a))

Step-up chopper

111

10 cells each with an EMF of 1.5 V and an internal resistance of 0.1 Ω are connected in series. What will be the total EMF and resistance of the circuit?

  1. ((a))

    3.21 V and 1.5 Ω

  2. ((b))

    1.18 V and 1.5 Ω

  3. ((c))

    4.15 V and 2.0 Ω

  4. ((d))

    15 V and 1.0 Ω

Show Answer
Answer: ((a))

3.21 V and 1.5 Ω

112

For which of the following gates the output is zero when one or more inputs are zero?

  1. ((a))

    OR

  2. ((b))

    NOR

  3. ((c))

    NOT

  4. ((d))

    AND

Show Answer
Answer: ((a))

OR

113

Fibre cables used for 'Fibre to Home' installations are _______.

  1. ((a))

    multimode graded

  2. ((b))

    multimode step

  3. ((c))

    multiaxis

  4. ((d))

    single mode

Show Answer
Answer: ((a))

multimode graded

114

Which of the following circuit has its output dependent only upon the present input?

  1. ((a))

    Analog Circuits

  2. ((b))

    Flip Flops

  3. ((c))

    Combinational Circuits

  4. ((d))

    Sequential Circuits

Show Answer
Answer: ((a))

Analog Circuits

115

Which of the following is a function of an inductor?

  1. ((a))

    It opposes the flow of AC

  2. ((b))

    It allows the flow of current.

  3. ((c))

    It opposes the flow of DC.

  4. ((d))

    It opposes the flow of both AC and DC.

Show Answer
Answer: ((a))

It opposes the flow of AC

116

In MS Excel, we cannot calculate:

  1. ((a))

    division solutions

  2. ((b))

    integration solutions

  3. ((c))

    arithmetic solutions

  4. ((d))

    multiplication solutions

Show Answer
Answer: ((a))

division solutions

117

78xx series ICs are:

  1. ((a))

    zener regulated

  2. ((b))

    series regulated

  3. ((c))

    shunt regulated

  4. ((d))

    series and shunt regulated

Show Answer
Answer: ((a))

zener regulated

118

Eddy current proximity sensors can detect _______.

  1. ((a))

    cotton

  2. ((b))

    metal

  3. ((c))

    wood

  4. ((d))

    ерохy

Show Answer
Answer: ((a))

cotton

119

CRO stands for:

  1. ((a))

    Cathode Relay Oscilloscope

  2. ((b))

    Cathode Ray Oscilloscope

  3. ((c))

    Cathode Rectifier Oscilloscope

  4. ((d))

    Cathode register oscilloscope

Show Answer
Answer: ((a))

Cathode Relay Oscilloscope

120

An IC with four NOR gates is:

  1. ((a))

    7486

  2. ((b))

    7404

  3. ((c))

    7432

  4. ((d))

    7402

Show Answer
Answer: ((a))

7486

121

Impedance can be measured by using which of the following equipment?

  1. ((a))

    CRO

  2. ((b))

    LCR meter

  3. ((c))

    Function generator

  4. ((d))

    DSO

Show Answer
Answer: ((a))

CRO

122

Race Around condition can be avoided in Digital logic circuits using?

  1. ((a))

    Shift Register

  2. ((b))

    Master Slave JK Flip Flop

  3. ((c))

    Full Adder

  4. ((d))

    AND Gate

Show Answer
Answer: ((a))

Shift Register

123

Windows 10 is a/an:

  1. ((a))

    booting system

  2. ((b))

    operating and booting system

  3. ((c))

    operating system

  4. ((d))

    counting pulse

Show Answer
Answer: ((a))

booting system

124

In a bipolar transistor, alpha is the ratio of:

  1. ((a))

    collector current to emitter current

  2. ((b))

    emitter current to collector current

  3. ((c))

    base current to collector current

  4. ((d))

    collector current to base current

Show Answer
Answer: ((a))

collector current to emitter current

125

In two-stage RC coupling, the function of a Cc capacitor is:

  1. ((a))

    to allow AC and DC to pass

  2. ((b))

    to block AC and DC

  3. ((c))

    to block DC voltage

  4. ((d))

    to block AC input signal

Show Answer
Answer: ((a))

to allow AC and DC to pass

126

A _______ can be represented as two port linear network.

  1. ((a))

    common base

  2. ((b))

    common collector

  3. ((c))

    common emitter

  4. ((d))

    hybrid parameter

Show Answer
Answer: ((a))

common base

127

A capacitor consists of ________ metal plates separated by an insulator.

  1. ((a))

    Three

  2. ((b))

    Two

  3. ((c))

    four

  4. ((d))

    one

Show Answer
Answer: ((a))

Three

128

What is the frequency band of shortwave radio transmission?

  1. ((a))

    1.7 to 30 GHz

  2. ((b))

    1.7 to 30 MHz

  3. ((c))

    1.7 to 30 kHz

  4. ((d))

    1.7 to 30 Hz

Show Answer
Answer: ((a))

1.7 to 30 GHz

129

What will be the power required by a bulb load having a resistance of 50 Ω if the voltage applied is 220 V?

  1. ((a))

    828 W

  2. ((b))

    1068 W

  3. ((c))

    968 W

  4. ((d))

    200 W

Show Answer
Answer: ((a))

828 W

130

Which of the following is an application of transformers?

  1. ((a))

    AC to AC conversion with isolation

  2. ((b))

    Regulate DC voltage

  3. ((c))

    DC to AC conversion

  4. ((d))

    AC to DC conversion

Show Answer
Answer: ((a))

AC to AC conversion with isolation

131

If current = 1.414 A and resistance = 50 Ω, then find power.

  1. ((a))

    400 Watts

  2. ((b))

    100 Watts

  3. ((c))

    300 Watts

  4. ((d))

    200 Watts

Show Answer
Answer: ((a))

400 Watts

132

Input ripple of SMPS is ________.

  1. ((a))

    high

  2. ((b))

    nil

  3. ((c))

    very low

  4. ((d))

    low

Show Answer
Answer: ((a))

high

133

What is the number of cycles completed by a 50-Hz line in 10 seconds?

  1. ((a))

    5000

  2. ((b))

    5

  3. ((c))

    500

  4. ((d))

    50

Show Answer
Answer: ((a))

5000

134

UJT is not used for:

  1. ((a))

    timing circuits

  2. ((b))

    phase control

  3. ((c))

    triggering an SCR/TRIAC

  4. ((d))

    amplification

Show Answer
Answer: ((a))

timing circuits

135

The output of Schmitt trigger is:

  1. ((a))

    Sine wave

  2. ((b))

    Square wave

  3. ((c))

    Random wave

  4. ((d))

    Rectangle wave

Show Answer
Answer: ((a))

Sine wave

136

Which component of a digital panel meter converts analogue signals into a digital format?

  1. ((a))

    ADC

  2. ((b))

    comparator

  3. ((c))

    magnetic field sensor

  4. ((d))

    hall sensor

Show Answer
Answer: ((a))

ADC

137

Heat sink of a power transistor can be used for:

  1. ((a))

    additional heat observation

  2. ((b))

    additional heat dissipation

  3. ((c))

    additional heat dissolution in water

  4. ((d))

    increasing the heat

Show Answer
Answer: ((a))

additional heat observation

138

Transformer losses are due to:

  1. ((a))

    core and copper losses

  2. ((b))

    primary loss

  3. ((c))

    only core losses

  4. ((d))

    only copper losses

Show Answer
Answer: ((a))

core and copper losses

139

Which of the following is a function of a resistor?

  1. ((a))

    It both allows and opposes the flow of current.

  2. ((b))

    It opposes the flow of current.

  3. ((c))

    It allows the flow of current.

  4. ((d))

    It neither allows nor opposes the flow of current.

Show Answer
Answer: ((a))

It both allows and opposes the flow of current.

140

Which of the following is used as a receiver for fibre optic communication?

  1. ((a))

    LED

  2. ((b))

    IR diode

  3. ((c))

    Photo diode

  4. ((d))

    LDR

Show Answer
Answer: ((a))

LED

141

In 8051 microcontroller the resultant of two numbers added is ________.

  1. ((a))

    Erased

  2. ((b))

    not stored anywhere

  3. ((c))

    stored in the accumulator

  4. ((d))

    stored in the register

Show Answer
Answer: ((a))

Erased

142

The following short name is also called as ________ for diode alternating current.

  1. ((a))

    DIAC

  2. ((b))

    SCR

  3. ((c))

    FET

  4. ((d))

    TRIAC

Show Answer
Answer: ((a))

DIAC

143

The binary representation for the hexadecimal number 4A is:

  1. ((a))

    101111

  2. ((b))

    111101

  3. ((c))

    101101

  4. ((d))

    1001010

Show Answer
Answer: ((a))

101111

144

The motor used in household refrigerators is

  1. ((a))

    single phase induction motor

  2. ((b))

    Hysteresis motor

  3. ((c))

    dc series motor

  4. ((d))

    Reluctance motor

Show Answer
Answer: ((a))

single phase induction motor

145

A push-pull amplifier is used for:

  1. ((a))

    voltage amplification

  2. ((b))

    current amplification

  3. ((c))

    RF signal amplification

  4. ((d))

    power amplification

Show Answer
Answer: ((a))

voltage amplification

146

Which of the following statements is true with respect to a Primary Cell?

  1. ((a))

    It can neither be recharged nor be reused.

  2. ((b))

    It cannot be recharged but can be reused.

  3. ((c))

    It can be recharged and reused.

  4. ((d))

    It can be recharged but cannot be reused.

Show Answer
Answer: ((a))

It can neither be recharged nor be reused.

147

Most widely used solar cell material is

  1. ((a))

    steel

  2. ((b))

    silicon

  3. ((c))

    mercury

  4. ((d))

    Cast iron

Show Answer
Answer: ((a))

steel

148

The device used for converting continuous DC to discontinuous DC is known as a/an ________.

  1. ((a))

    chopper

  2. ((b))

    rectifier

  3. ((c))

    oscillator

  4. ((d))

    amplifier

Show Answer
Answer: ((a))

chopper

149

A limiter circuit is also known as a:

  1. ((a))

    clamp circuit

  2. ((b))

    chopping circuit

  3. ((c))

    clipper circuit

  4. ((d))

    chopper circuit

Show Answer
Answer: ((a))

clamp circuit

150

Burglar alarm circuits consist of

  1. ((a))

    LCDs

  2. ((b))

    VCDs

  3. ((c))

    LVDs

  4. ((d))

    IRLEDs

Show Answer
Answer: ((a))

LCDs

151

What happens if a capacitor is placed in parallel with a DC source?

  1. ((a))

    It amplifies the voltage.

  2. ((b))

    The circuit acts as an open circuit.

  3. ((c))

    The circuit acts as a short circuit.

  4. ((d))

    It converts DC to AC.

Show Answer
Answer: ((a))

It amplifies the voltage.

152

If a capacitor is placed in the feedback path of an op-amp circuit, then the circuit can act as

  1. ((a))

    integrator

  2. ((b))

    multiplier

  3. ((c))

    divider

  4. ((d))

    subtractor

Show Answer
Answer: ((a))

integrator

153

The source of light for optic fibre transmission is _______.

  1. ((a))

    ARC lamp

  2. ((b))

    LED

  3. ((c))

    mercury lamp

  4. ((d))

    incandescent lamp

Show Answer
Answer: ((a))

ARC lamp

154

BC 194 is the transistor used for:

  1. ((a))

    the amplification of AF and RF signals

  2. ((b))

    the rectification of AC

  3. ((c))

    the amplification of AF signal

  4. ((d))

    the amplification of RF signal

Show Answer
Answer: ((a))

the amplification of AF and RF signals

155

How many counter/timer does the 8051 microcontroller have?

  1. ((a))

    2

  2. ((b))

    8

  3. ((c))

    4

  4. ((d))

    1

Show Answer
Answer: ((a))

2

156

What happens to the resistance of an RTD with an increase in temperature?

  1. ((a))

    It is uncertain.

  2. ((b))

    It increases.

  3. ((c))

    It remains the same.

  4. ((d))

    It decreases.

Show Answer
Answer: ((a))

It is uncertain.

157

16-bit registers consist of:

  1. ((a))

    16 flip-flops

  2. ((b))

    20 flip-flops

  3. ((c))

    12 flip-flops

  4. ((d))

    8 flip-flops

Show Answer
Answer: ((a))

16 flip-flops

158

Identify the type of antenna shown in the following picture.

  1. ((a))

    Circular

  2. ((b))

    Bi-pole

  3. ((c))

    Monopole

  4. ((d))

    Yagi

Show Answer
Answer: ((a))

Circular

159

The power factor of a D.C. circuit is always

  1. ((a))

    Leading

  2. ((b))

    Unity

  3. ((c))

    Lagging

  4. ((d))

    zero

Show Answer
Answer: ((a))

Leading

160

In simple oscillators, _______ are used.

  1. ((a))

    UJTs

  2. ((b))

    zener diodes

  3. ((c))

    SCRs

  4. ((d))

    TRIACs

Show Answer
Answer: ((a))

UJTs

161

How can a higher voltage be obtained from a solar cell?

  1. ((a))

    By connecting multiple cells in series

  2. ((b))

    By increasing its thickness

  3. ((c))

    By connecting multiple cells in parallel

  4. ((d))

    By decreasing its thickness

Show Answer
Answer: ((a))

By connecting multiple cells in series

162

For pulse generation, the IC used is:

  1. ((a))

    7402

  2. ((b))

    555

  3. ((c))

    7805

  4. ((d))

    7432

Show Answer
Answer: ((a))

7402

163

What is the material used for the manufacture of fiber optic cables?

  1. ((a))

    Wood

  2. ((b))

    Steel

  3. ((c))

    Plastic

  4. ((d))

    Glass

Show Answer
Answer: ((a))

Wood

164

The frequency of the rotor current in an induction motor is equal to:

  1. ((a))

    slip × input frequency

  2. ((b))

    slip × stator current

  3. ((c))

    half of the input frequency

  4. ((d))

    the stator current

Show Answer
Answer: ((a))

slip × input frequency

165

The combination of two half adders is a ________.

  1. ((a))

    full adder

  2. ((b))

    Schimtt trigger

  3. ((c))

    Comparator

  4. ((d))

    half adder

Show Answer
Answer: ((a))

full adder

166

The average value of sine wave is ________ times the peak value.

  1. ((a))

    1.414

  2. ((b))

    0.637

  3. ((c))

    2.414

  4. ((d))

    1.732

Show Answer
Answer: ((a))

1.414

167

The following figure represents a/an ________.

  1. ((a))

    HEATER

  2. ((b))

    FUSE

  3. ((c))

    MCB

  4. ((d))

    SWITCH

Show Answer
Answer: ((a))

HEATER

168

An LVDT is used for measuring _________.

  1. ((a))

    frequency

  2. ((b))

    speed

  3. ((c))

    temperature

  4. ((d))

    displacement

Show Answer
Answer: ((a))

frequency

169

The current towards a junction is:

  1. ((a))

    twice the current towards the junction

  2. ((b))

    equal to the current away from the junction

  3. ((c))

    equal to the sum of currents towards the junction

  4. ((d))

    not equal to the current away from the junction

Show Answer
Answer: ((a))

twice the current towards the junction

170

What is unity gain amplifier also known as?

  1. ((a))

    Voltage follower

  2. ((b))

    Comparator

  3. ((c))

    Single sided

  4. ((d))

    Differential

Show Answer
Answer: ((a))

Voltage follower

171

Sine Wave RMS = ________.

  1. ((a))

    Peak voltage/Square root of 5

  2. ((b))

    Peak voltage/Square root of 2

  3. ((c))

    Peak voltage/Square root of 6

  4. ((d))

    Peak voltage/Square root of 3

Show Answer
Answer: ((a))

Peak voltage/Square root of 5

172

In case of an AC input signal in CE Transistor Load line can be given by a plot of

  1. ((a))

    VCE & Ic

  2. ((b))

    VBE vs Ic

  3. ((c))

    VCE & Rc

  4. ((d))

    VBE vs Ib

Show Answer
Answer: ((a))

VCE & Ic

173

Cells are connected in series in order to

  1. ((a))

    Decrease the voltage

  2. ((b))

    Increase the Voltage

  3. ((c))

    Increase the current

  4. ((d))

    Increase the cell life

Show Answer
Answer: ((a))

Decrease the voltage

174

The gain of an amplifier with feedback is known as ________ gain.

  1. ((a))

    High

  2. ((b))

    Open loop

  3. ((c))

    Closed loop

  4. ((d))

    Low

Show Answer
Answer: ((a))

High

175

Forward biasing of a PN junction diode is indicated by which of the following connections?

  1. ((a))

    −ve to anode and +ve to cathode for full cycle

  2. ((b))

    +ve to anode and −ve to cathode for full cycle

  3. ((c))

    +ve to cathode and −ve to anode for one half cycle, and +ve to anode and −ve to cathode for the second half cycle.

  4. ((d))

    −ve to cathode and −ve to anode for full cycle

Show Answer
Answer: ((a))

−ve to anode and +ve to cathode for full cycle

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