SSC JE 9 Oct 2023 PAPER I Electrical Part 8
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.76 Consider the following statements about the working of a hysteresis motor and choose the suitable combination of correct choices.a. The stator of the hysteresis motor has a main winding along with an auxiliary winding.b. When the stator winding is fed from a single phase supply, it produces a synchronously revolving magnetic field.c. The rotor material has low retentivity so hysteresis loss is low.d. The rotor of the hysteresis motor consists of a smooth cylinder of magnetically hard steel, without winding
1. Only d is correct.
2. Only b, c and d are correct.
3. Only a, b and d are correct.
4. Only c is correct.
Correct Option: 3
Q.77 What is the main reason of placing field winding on the stationary rotor?
1. Field circuit possesses less power.
2. Stator is associated with more current.
3. Insulation of high voltage is made easy on stator than on rotor.
4. Stator is associated with more power.
Correct Option: 3
Q.78 Reciprocity theorem CANNOT be applied to the circuit having ______.
1. linear elements
2. only one independent sources
3. bilateral elements
4. non-linear elements and multi -sources
Correct Option: 4
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.79 The change in current through a junction diode is 1.5 mA when the forward bias voltage is changed by 0.6 V. The dynamic resistance is ________.
1. 600 Ω
2. 500 Ω
3. 400 Ω
4. 300 Ω
Correct Option: 3
Q.81 If the frequency of supply in a three core underground cable is doubled, the charging current will be ______.
1. half
2. three times
3. four times
4. double
Correct Option: 4
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.82 In case of magnetic circuits, the force that tends to create magnetic flux is called _________.
1. absolute permeability
2. relative permeability
3. MMF
4. reluctance
Correct Option: 3
Q.83 In motor applications, efficiency of the motor is always less than 100% due to conversion of the _____.
1. input energy into heat
2. output energy into current
3. input energy into voltage
4. output energy into heat
Correct Option: 1
Q.84 Which law gives the direction of induced EMF?
1. Maxwell’s law
2. Gauss’s law
3. Newton’s law
4. Lenz’s law
Correct Option: 4
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.85 A rectifier type instrument uses a bridge rectifier and has its scale calibrated in terms of rms value of a sine wave. It indicates a voltage of 3.33 V when measuring a voltage of a triangular wave shape. Calculate the peak value of the applied voltage?
1. 6 Volts
2. 9.99 Volts
3. 6.66 Volts
4. 9 Volts
Correct Option: 1
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.87 In an electrical circuit, the current that changes periodically, both in magnitude and direction, at regular intervals of time is called ______.
1. leading current
2. alternating current
3. direct current
4. phase current
Correct Option: 2
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.89 The deflection sensitivity in a cathode ray oscilloscope (CRO) is ________ the mass of electron.
1. directly proportional to the square root of
2. directly proportional to
3. inversely proportional to the square root of
4. inversely proportional to
Correct Option: 3
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.90 The wavelength of a sodium vapour lamp is ____________.
1. 589 nm
2. 254 nm
3. 326 nm
4. 673 nm
Correct Option: 1
Q.91 Which of the following statements is NOT correct about active power in an AC circuit?
1. Active power depends on power factor.
2. Active power can be measured in terms of kilo watt.
3. Active power is the power dissipated in the pure inductance.
4. Active power is the power dissipated in the pure resistance.
Correct Option: 3
Q.93 A 2500 watts refrigerator works for 4 hours per day. Find the total unit of electricity used in 40 days.
1. 400 units
2. 400000 units
3. 40 units
4. 10 units
Correct Option: 1
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.94 Which of the following statements is NOT correct about the significance of stationary armature alternator?
1. The armature windings can be braced better mechanically against the high electromagnetic force.
2. The armature windings of the rotating field alternator are not subjected to centrifugal forces.
3. The rotating field type alternator has a smaller size than the rotating armature type.
4. The output current can be easily taken from rotor winding.
Correct Option: 4
Q.95 What type of rotor is used in alternators driven by hydro-turbines?
1. Salient pole type
2. Non-salient pole type
3. Smooth cylindrical type
4. Shaded pole type
Correct Option: 1
Q.96 The load on the transformer changes every day, with a daily production of 120 kWh and a cumulative loss of 5 kWh. What is the all-day efficiency of the transformer?
1. 95%
2. 92%
3. 90%
4. 96%
Correct Option: 4
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.97 In an electronic circuit, the potential difference across any one resistor is a fraction of the total voltage applied across the series combination. Such a circuit is called ______.
1. voltage multiplier circuit
2. current divider circuit
3. voltage divider circuit
4. current multiplier circuit
Correct Option: 3
Q.98 A substation is a facility that transmits and distributes electricity. It serves as an intermediary between electricity plants and end users. Which of the following statements about substations is INCORRECT?
1. Domestic consumers may also connect directly to the main transmission network.
2. All of the options
3. At the point of interconnection between two distinct transmission voltages, transformers may be installed in a substation.
4. Rotary converters are also used in railway substations.
Correct Option: 1
Q.99 The electrical pressure measured between any two points in an electrical circuit is called _____.
1. resistivity
2. voltage
3. energy
4. work done
Correct Option: 2
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
Q.100 Which of the following is NOT an advantage of shell type transformers over core type transformers?
1. Less copper requirement
2. Reduced loss
3. Easy maintenance
4. High mechanical strength
Correct Option: 3
SSC JE 9 Oct 2023 PAPER I Electrical Part 8
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