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Question 551

RRB JE 2026• Technical Abilities

The fundamental operating principle of a transformer is based on:

  1. AOption (a)

    electromagnetic induction between two electrically isolated coils magnetically coupled through a low-reluctance magnetic circuit

  2. BOption (b)

    conversion of alternating current (AC) into direct current (DC) via semiconductor devices

  3. COption (c)

    mechanical coupling of coils to facilitate energy transfer through physical motion

  4. DOption (d)

    direct electrical conduction between primary and secondary windings for energy transfer

View answer & explanation

Correct answer

Answer: (a)A.

electromagnetic induction between two electrically isolated coils magnetically coupled through a low-reluctance magnetic circuit

Explanation not yet available.

Question 552

RRB JE 2026• Technical Abilities

At which voltage level are the maximum consumers connected?

  1. AOption (a)

    secondary distribution level

  2. BOption (b)

    primary distribution level

  3. COption (c)

    secondary transmission level

  4. DOption (d)

    primary transmission level

View answer & explanation

Correct answer

Answer: (a)A.

secondary distribution level

Explanation not yet available.

Question 553

RRB JE 2026• Technical Abilities

A single-phase preventer continuously monitors and protects preferably which motor against phase failure?

  1. AOption (a)

    Single phase induction motor

  2. BOption (b)

    3-phase induction motor

  3. COption (c)

    Reluctance motor

  4. DOption (d)

    DC Motor

View answer & explanation

Correct answer

Answer: (a)A.

Single phase induction motor

Explanation not yet available.

Question 554

RRB JE 2026• Technical Abilities

What does the plant use factor represent?

  1. AOption (a)

    The ratio of actual energy generated to the product of plant capacity and hours of use

  2. BOption (b)

    The ratio of actual energy generated to the total installed capacity

  3. COption (c)

    The ratio of average load to maximum demand

  4. DOption (d)

    The ratio of maximum demand to the total installed capacity

View answer & explanation

Correct answer

Answer: (a)A.

The ratio of actual energy generated to the product of plant capacity and hours of use

Explanation not yet available.

Question 555

RRB JE 2026• Technical Abilities

Which among the given statements correctly distinguishes Avalanche breakdown from Zener breakdown in a PN junction diode?

  1. AOption (a)

    Avalanche breakdown is the predominant mechanism in lightly doped junctions.

  2. BOption (b)

    Zener breakdown voltage is typically higher than the avalanche breakdown voltage.

  3. COption (c)

    Zener breakdown occurs only under forward bias conditions.

  4. DOption (d)

    Avalanche breakdown does not result in a sharp increase in reverse current.

View answer & explanation

Correct answer

Answer: (a)A.

Avalanche breakdown is the predominant mechanism in lightly doped junctions.

Explanation not yet available.

Question 556

RRB JE 2026• Technical Abilities

A current I flows through a circular loop. If the radius of the loop is reduced to half and the current is doubled, the magnetic field intensity at the center becomes:

  1. AOption (a)

    Unchanged

  2. BOption (b)

    Eight times the original value

  3. COption (c)

    Four times the original value

  4. DOption (d)

    Twice the original value

View answer & explanation

Correct answer

Answer: (a)A.

Unchanged

Explanation not yet available.

Question 557

RRB JE 2026• Technical Abilities

What is the primary fuel used in a biomass power plant?

  1. AOption (a)

    Coal

  2. BOption (b)

    Natural gas

  3. COption (c)

    Uranium

  4. DOption (d)

    Organic waste materials

View answer & explanation

Correct answer

Answer: (a)A.

Coal

Explanation not yet available.

Question 558

RRB JE 2026• Technical Abilities

A maximum demand tariff is designed to encourage consumers to _________________.

  1. AOption (a)

    Reduce overall energy consumption

  2. BOption (b)

    Manage and reduce their peak power demand

  3. COption (c)

    Adopt renewable energy sources

  4. DOption (d)

    Increase energy production

View answer & explanation

Correct answer

Answer: (a)A.

Reduce overall energy consumption

Explanation not yet available.

Question 559

RRB JE 2026• Technical Abilities

In a parallel RC circuit connected to a single-phase AC supply, the correct relationship between the supply voltage and the total circuit current is _________.

  1. AOption (a)

    Current is in phase with the voltage

  2. BOption (b)

    Current lags the voltage

  3. COption (c)

    Current and voltage are 180° out of phase

  4. DOption (d)

    Current leads the voltage

View answer & explanation

Correct answer

Answer: (a)A.

Current is in phase with the voltage

Explanation not yet available.

Question 560

RRB JE 2026• Technical Abilities

A 12 V battery is connected in series with two resistors 4 Ω and 6 Ω, forming a closed circuit. What is the Thevenin equivalent resistance across the terminals of the 6 Ω resistor after it is removed?

  1. AOption (a)

    10 Ω

  2. BOption (b)

    6 Ω

  3. COption (c)

    4 Ω

  4. DOption (d)

    2 Ω

View answer & explanation

Correct answer

Answer: (a)A.

10 Ω

Explanation not yet available.
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