SSC JE Electrical 6 Nov 2024 Official Paper - II (Previous Year Paper)

Which of the following pairs correctly defines the term in definition?

What type of electrical signal is shown in the given figure?

A 12-pole alternator running at a speed of 600 rpm will produce a frequency of

The no-load primary input current lags the primary voltage by an angle

Which of the given options best describes the truthfulness of the following statements with reference to the properties of the magnetic circuits? P: Permeance is the opposition offered to the magnetic flux by the magnetic path. Q: Magnetic lines of force cannot pass through air.

For a series RLC circuit, at resonance the

Find the voltage 'v₁' in the following circuit.

In an indirect arc furnace, the heat is transmitted from the arc to the top layer of the charge by and it operates at a power factor of

Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).

(A): Open tenders are invited by public advertisement.

(R): Any contractor who is willing to undertake the work and who has the requisite finance and equipment to complete the work satisfactorily is allowed to submit the offer.

A single-stack, eight-phase, multipole stepper motor has six rotor teeth. The phases are excited one at a time. Determine the number of steps per revolution.

Choose the correct pair of bridge with its application:

If an electrical device consumes 50 watts of power for 10 minutes, what is the total electrical energy consumed by the device?

Match the different types of lamps with their relative luminous efficiencies.

The turbine is a reaction turbine in which the runner receives water axially.

Which of the following is NOT a valid advantage of capacitor-start capacitor-run motor?

When applying Thevenin's Theorem to a circuit, if the Thevenin voltage is 40 V and the Thevenin equivalent resistance is 5Ω, what is the current through a load resistor of 15Ω connected across the terminals?

A 15 -V source is applied to a capacitive circuit that has an impedance of (6-j8)Ω. Find the angle by which the current leads the voltage.

Which of the following pair of typical diodes and their corresponding threshold voltages is INCORRECT?

Which of the following is called the mechanical characteristic of a DC motor?

Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).

(A): In a synchronous generator phasor diagram, the armature current (Ia) is in phase with the excitation voltage (Ef), and the excitation voltage leads to the terminal voltage (Vt).

(R): When a synchronous generator operates in generating mode, the armature current is in phase with the excitation voltage, and the excitation voltage leads to the terminal voltage.

In a resistance start motor, the pull-out torque is about 2.5 times the full load torque at about ( ) of synchronous speed.

In a network with multiple resistors, if the delta-star transformation is applied, what is the equivalent delta resistance for a star-connected set of resistors R1=6 Ω, R2=10Ω, and R3=15Ω ?

Find the equivalent capacitance 'C_eq' in the following circuit.

Calculate the power dissipated in the Zener diode in the following circuit.

In an AC current-carrying conductor, the skin effect ( ) with the increase in diameter of the conductor and ( ) with the increase in frequency.

Which of the following is the correct sequence of layers from the outermost to the innermost in underground cables?

Which of the following is a correct pair of LC oscillators?

Assertion (A): Fixed charges in power generation remain constant regardless of the plant's capacity or operation.

Reason (R): Semi-fixed charges are dependent on the installed capacity of the plant and include costs like interest, depreciation, taxes, and insurance premiums.

Find the voltage 'v_o' in the following circuit.

Which of the following statements is correct regarding the classification of transmission and distribution lines?

Match the Following

A generating station has installed capacity of 50,000 kW and delivers (250×10⁶) units per annum. If the annual fixed charges are ₹160 per kW installed capacity and running charges are 4 paise per kWh, determine the cost per unit generated.

A synchronous motor is said to be over-excited when:

Match the Following:

If the maximum demand on the plant is equal to the plant capacity, then the reserve capacity of the plant will be ( ).

Find the Norton's equivalent of the following circuit.

How do electrical connections differ in wiring diagrams compared to schematic diagrams?

The frequency of the sinusoidal voltage expressed as v(t)=50sin⁡80πt is ( ).

In a series RL circuit, the phase difference between the voltage and current will ( ).

In ring main distribution system, each distribution transformer is fed with ( ) feeder / feeders.

Which statement is incorrect for Tender?

Which statement accurately describes the working principle of single-phase motors?

Determine the energy stored by a 2 H inductor, when the current flowing through it is 4 A.

Choose the correct pair of transformer type with correct application?

The magnetic force per unit length between two parallel current carrying conductors is ( ).

Select the correct pair of type of industrial heating and the way in which the heating is obtained.

With reference to the shaded pole induction motor, state true/false for the following statements:

P : The shaded pole motor rotates in only one direction.

Q: In the shaded pole motor, the copper ring acts as a secondary winding for the motor.

In the questions given below, there are two statements marked as Assertion (A) and Reason (R). Mark your answer as per the codes provided below:

Assertion (A): Stepper motors are suitable for positioning applications where holding a position is essential, and they are generally less expensive.

Reason (R): Servomotors are true feedback positioners with encoders, providing precise control over motion and speed.

In a parallel RL circuit, the inductive susceptance is given by ( ).

The coils of a DC motor starter are wound with wire of Manganin because of the ( ) temperature coefficient of resistance and ( ) thermoelectric EMF, respectively.

Which of the following motors divides the full rotation into equal number of steps?

An overhead transmission line is supported by supports at equal levels. Assuming the weight per unit length and tension in the conductor constant, if the length of the conductor span is ( ) then the sag will decrease by 25%.

Which of the following application of CRO is incorrect?

Which of the following is the most important factor governing the selection of an electric motor in electives among the following options?

Explore the characteristics of outdoor cables and their suitability for different conditions. Assess the following statements and determine their correctness.

**Statements:**I. Outdoor cables are designed to be buried underground and can withstand exposure to harsh elements.

II. Underground Burial Cables, with water-blocking fillers or polymer gel, ensure long-term resistance to water infiltration into the core.

Which of the given options best describes the truthfulness of the following statements?

P: Within the solenoid, the field lines are in the form of parallel straight lines.

Q : The field within the solenoid is uniform.

R : Both ends of the solenoid act as magnetic north poles.

Select the option that is true regarding the following two statements labelled Assertion (A) and Reason (R).

(A): Synchronous motors can be used to improve the voltage regulation of the transmission lines.

(R): Synchronous motors are well suited where constant speed is required.

Match the Following

Find the voltage 'V_ab' between terminals 'a' and 'b' in the following figure.

What is the power consumption, in watts, of a 1/4HP motor, according to the provided information?

Which of the following statements are correct?

P: Biomass energy or fuel cannot be stored and distributed.

Q: The emissions from biomass energy generation can potentially pollute the environment.

R: Biomass power plants that use pyrolysis are more efficient than direct combustion power plants.

Which of the following equations is correct according to the given parallel circuit?

With reference to DC arc welding, which of the following statements is INCORRECT?

What type of component in an electrical circuit has to be used to deliver power or process electrical signals?

Which of the following pairs of typical diodes and their corresponding threshold voltages is correct?

Explore the components and systems related to the thermal power plant. Assess the following statements and determine their correctness.\nStatements:\nI. Ash handling plants (AHPs) remove ash from furnace ash hoppers, convey it through mechanical, hydraulic, or pneumatic transport, and dispose of the stored ash.\nII. The electrical thermal plant involves supplying medium voltage, low voltage, and direct current power to all loads in the power plant, covering aspects from power evacuation to switchyard control.

A 240-V DC shunt motor has an armature resistance of 0.25Ω and runs at 1000 RPM, taking an armature current of 40 A. It is desired to reduce the speed to 800 RPM. If the armature current remains the same, find the additional resistance to be connected in series with the armature circuit.

Which of the following is a VALID disadvantage of single bus bar system?

Under no-load conditions, if the frequency of the AC supply is decreased while maintaining a constant magnetic flux in a single-phase transformer, what is the anticipated impact on the induced voltage in the secondary winding?

Which of the following is NOT a valid disadvantage of shaded-pole type single-phase induction motor?

A 36-pole alternator running at a speed of □( ) RPM will produce a frequency of 60 Hz.

Which of the following distribution systems is considered common?

Which of the following oscillators is generally considered a fixed frequency oscillator?

With reference to the methods of determination of voltage regulation of smooth cylindrical rotor type alternators, which of the following methods is known as zero-power factor method?

Determine the total charge transferred over the time interval of 0≤t≤10 s, when the current is given as i(t)=0.5t A.

What is the mathematical representation of solid angle (ω) in terms of area (A) and radius (r)?

What will be the main consideration in quotation of any electrical installation?

In a transformer, the core loss is found to be 52 W at 40 Hz and 90 W at 60 Hz, measured at same peak flux density. Compute the eddy current loss at 50 Hz.

Which of the following is a passive electronic component?

Explore the components and systems related to the thermal power plant. Assess the following statements and determine their correctness. Statements:

I. Water economizers in boiler installations increase efficiency by utilizing the heat of exhaust gases.

II. The electrical thermal plant involves supplying medium voltage, low voltage, and direct current power to all loads in the power plant, covering aspects from power evacuation to switchyard control.

Two long parallel conductors, each one carrying current 100 A, flowing in the same direction, are separated by 1 cm in air. Find the force per metre length of the conductor.

What is the significance of Rule 29 in the Indian Electricity Rules, 2005, regarding electrical installations?

In a cathode-ray tube, the focusing anode is positioned between the □( ).

Which of the given options best describes the truthfulness of the following statements with reference to mechanical draught and natural draught in a thermal power plant?

P: Mechanical draught is independent of atmospheric temperature.

Q: In case of natural draught, the chimney height is more.

Match the following terms with their correct formula in the context of work (W), power(P), and energy(E):

What component, integral to electrostatics, is designed to accumulate and discharge electrical energy by utilizing the electric field between two conductive plates?

A potential barrier of 0.7 V exists across a PN-junction. Calculate the intensity of the electric field in the depletion region, if the width of the depletion region is (3.5×10^-7 m.

Under what conditions does an alternator exhibit a zero-voltage regulation?

Which of the following statements is INCORRECT?

In a complex electrical network, applying Norton's Theorem involves finding the Norton current and Norton equivalent resistance. What is the Norton equivalent resistance for a network with resistances R1=8Ω and R2=12Ω in parallel?

Find the voltage ' v₁ ' in the following circuit.

Which of the following statements about the torque vs. armature current (Ta-la) characteristic of DC series motors is correct?

What is the primary difference between Avalanche breakdown and Zener breakdown in a p-n junction diode?

Match the transistor configuration with the corresponding output resistance of the configuration.

Which of the following statements is INCORRECT for the superposition theorem?

The impedance of a series RL circuit is 130Ω. If the inductive reactance (X_L ) in the circuit is 50Ω, find the value of the resistance.

In a 3-wire DC system, in order to maintain voltages on the two sides of the neutral equal to each other, a/an □( ) is used.

Which of the following is NOT a diamagnetic material?

What is the term used to describe the combination of a transmission line's resistance, inductance, and capacitance, influencing the voltage drop along the line and its ability to transfer power efficiently?

In a Cathode Ray Tube (CRT) used for frequency comparison, how are the electrons deflected to compare frequencies?