| 1. | What will be the value of current (in A) in a 50 cm long air-core solenoid, if the value of magnetic field at the center of the solenoid is 5 mT and the solenoid has 300 turns ? | |
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6.63
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5.63
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4.36
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8.25
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Report Question| 2. | Determine the maximum flux density (in T} of a material having eddy current coefficient of 2, thickness of 4 mm, volume of 20 cu. meter, which is supplied by a frequency of 50 Hz when the material has eddy current loss of 6 W ? | |
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2.24
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3.34
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1.94
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1.21
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| 3. | What is the peak-to-peak value of a sinusoidal voltage (in V) having average value of 100 V ? | |
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141.44
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159.98
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282.88
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313.97
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| 4. | Calculate the phase angle between the voltage and current phasor of a series RL circuit having resistance of 65 Ohms and inductive reactance of 37.53 Ohms when supplied by a frequency of 60 Hz ? | |
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15
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30
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45
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60
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| 5. | Calculate the value of resonant frequency (in kHz) of a tank circuit having capacitance of 0.01 mF and inductance of 0.01 mH ? | |
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0.1591
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1.591
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15.91
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159.1
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| 6. | Calculate the induced emf (in V) in the inductor of a series RL circuit having inductance of 1.8 H and resistance of 90 Ohms after 20 milli-seconds, when supplied by a 20 V DC source ? | |
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7.36
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10.03
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14.76
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20
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| 7. | A delta connected 3-phase circuit has three equal resistances of 36 Ohms in each phase. What is the value of per phase resistance (in Ohms) of the equivalent star connected circuit ? | |
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12
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36
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84
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108
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| 8. | Calculate the power factor of an AC circuit having an impedance of 16 Ohms, if a 4 A current flows through it and its average power consumption is 200 W ? | |
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0.68
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0.78
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0.88
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0.98
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| 9. | Power consumed by a balanced star connected 3-phase load is measured using two-wattmeter method. The phase voltage and phase current in the load is 220 V and 10 A respectively. What will be difference in reading (in W) of the Mo wattmeter, if the power factor of the system is 0.8 lagging ? | |
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2861.2
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2286.3
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3810.5
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3048.4
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| 10. | A house has 5 fans of 70 W each that operate for 16 hours a day and one washing machine of 2000 W that operates for 1 hour per day in the month of June. What is the energy consumption (in kWh) of the house in the month of June ? | |
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228
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235.6
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350
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486.6
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