SSC JE 10 Oct 2023 PAPER I Electrical Part 8

Q.78 A wire of resistance 88 Ω is stretched to twice its original length. The resistance of a stretched wire would be _________.

1. 352 Ω
2. 176 Ω
3. 22 Ω
4. 88 Ω

Correct Option: 1

SSC JE 10 Oct 2023 PAPER I Electrical Part 8

Q.79 The candle power of a lamp placed normal to a working plane is 40 candle power. Find the distance if the illumination is 10 lux?

1. 3 m
2. 2.5 m
3. 1.414 m
4. 2 m

Correct Option: 4

Q.80 Diffusion capacitance of a p-n junction diode increases with increase in the ________ and the ________.

1. mean lifetime of minority carriers; thermal voltage
2. thermal voltage; ideality factor (ƞ)
3. diode current; thermal voltage
4. mean lifetime of minority carriers; diode current

Correct Option: 4

Q.81 Which of the following statements is NOT correct about generation of alternating voltage?

1. An increase in the number of poles, increases the frequency.
2. A 4-pole generator completes four cycles per revolution.
3. The number of times the armature rotates per second, the same number of cycles will be produced by the armature voltage.
4. For the production of voltage, either the armature or the field rotates.

Correct Option: 2

SSC JE 10 Oct 2023 PAPER I Electrical Part 8

Q.82 Which of the following is NOT suitable for the overhead conductor of a transmission line?

1. High tensile strength
2. High specific gravity
3. Lower cost
4. High electrical conductivity

Correct Option: 2

Q.83 Which of the following types of fields is used as a coupling medium in all electromechanical conversion devices?

1. Thermal field only
2. Magnetic field only
3. Both electric field and magnetic field
4. Electric field only

Correct Option: 2

Q.84 The armature resistance of a 220 volt DC machine is 0.5 ohm. What is the value of the back EMF when the machine functions as a motor if the full load armature current is 25 amps?

1. 207.5 V
2. 209 V
3. 210 V
4. 207 V

Correct Option: 1

SSC JE 10 Oct 2023 PAPER I Electrical Part 8

Q.86 In electrical applications, electric geyser coils are made up of a _________.

1. high-inductance metal
2. high-resistance metal
3. low-inductance metal
4. low-resistance metal

Correct Option: 2

Q.87 Which of the following lamps is well suited for street lightning in terms of high luminous efficiency?

1. Sodium vapour lamp
2. Fluorescent lamp
3. Compact fluorescent lamp
4. Incandescent lamp

Correct Option: 1

SSC JE 10 Oct 2023 PAPER I Electrical Part 8

Q.88 In case of magnetic circuits, the ratio of the flux density developed in the magnetic material to the flux density developed in air, for the same amount of magnetising force applied to it, is called _________.

1. absolute permeability
2. reluctance
3. EMF
4. relative permeability

Correct Option: 4

Q.89 In a shaded-pole induction motor, the main core flux is ___________ by the flux in the ring that is developed by the ___________ current.

1. opposed; circulating
2. supported; circulating
3. supported; constant
4. opposed; constant

Correct Option: 1

Q.90 The method of creating uniform electrostatic stress in the dielectric of underground cables is known as ______ of cables.

1. grading
2. jointing
3. armouring
4. laying

Correct Option: 1

SSC JE 10 Oct 2023 PAPER I Electrical Part 8

Q.91 What will be the phase difference between the alternating current and the voltage represented by the followingequation I = I0 sin (ωt) and E = E0 cos (ωt + π/3)?

1. π/3
2. 5π/6
3. 5π/3
4. 4π/3

Correct Option: 2

Q.92 Which of the following statements is true regarding the voltage drop due to armature reaction for unity power factors in an alternator?

1. The voltage drop is minimum for unity power factors.
2. The voltage drop remains constant irrespective of the power factor.
3. The voltage drop is zero for unity power factors.
4. The voltage drop is maximum for unity power factors.

Correct Option: 1

Q.93 Mechanical losses in a synchronous motor include:

1. Joule losses in the rotor winding
2. core losses in the laminations
3. Eddy current losses in the stator
4. friction and windage losses

Correct Option: 4

SSC JE 10 Oct 2023 PAPER I Electrical Part 8

Q.94 How many terminals does a servo-motor contain?

1. 1
2. 3
3. 2
4. 4

Correct Option: 2

Q.95 Which of the following is used with the pressure coil to bring the flux produced by the shunt magnet exactly in quadrature with the applied voltage?

1. Aluminium shading bands are provided on the central limb
2. Copper shading bands are provided on the central limb
3. Copper shading bands are provided on the U limb
4. Aluminium shading bands are provided on the U limb

Correct Option: 2

Q.96 If the energy stored in a 5H inductor is 160 joules, then calculate the current passing through it.

1. 64 A
2. 8 A
3. 18 A
4. 10 A

Correct Option: 2

SSC JE 10 Oct 2023 PAPER I Electrical Part 8