| 1. | What is the average value of a DC voltage having a peak value of 25 V ? | |
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0
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17.73
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22.5
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25
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Report Question| 2. | The inductive reactance of a circuit is 60 Ohms when it is supplied with a 50 Hz supply. What will be the value of inductive reactance (in Ohms) of the circuit, if it is supplied with 60 Hz supply ? | |
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72
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86
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94
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105
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| 3. | Calculate the value of the quality factor of a series RLC circuit having resistance, inductance and capacitance of 30 Ohms, 27 mH and 0.03 mF respectively ? | |
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0.86
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1
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2.6
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3
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| 4. | What is the bandwidth (in kHz) of a series RLC circuit having resistance, inductance and capacitance of 80 Ohms, 2 mH and 0.01 mF respectively ? | |
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10
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20
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40
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80
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| 5. | Calculate the time taken (in seconds) by the capacitor to get fully charged in a series RC circuit having resistance and capacitance of 40 kilo-Ohms and 0.01 mF respectively ? | |
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1
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2
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3
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4
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| 6. | What is the value of line voltage (in kV) of a 3-phase star connected system having a phase voltage of 3.3 kV ? | |
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2.1
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3.3
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5.7
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6.8
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| 7. | A 3-phase star connected system is supplied by a line voltage of 440 V. The value of phase current is 50 A. What is the power (in kW) consumed by the system, if the current lags the voltage by 45 degrees ? | |
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8.95
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24
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26.94
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47
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| 8. | What is the magnitude of reactive power (in kVAR) of a balanced 3-phase delta connected system having a line voltage of 400 V and a line current of 50 A and the phase difference between the voltage and current is 53.13 degrees ? | |
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0.2771
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2.771
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27.71
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277.1
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| 9. | Which of the following is the dimension of inductance ? | |
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ML²/Q²
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Q²T³/ML²
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ML²/QT²
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ML²/QT³
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| 10. | In ‘two-wattmeter method' of power calculation of a 3-phase balanced star connected system, what is the power factor of the system if both the wattmeters show a positive reading ? | |
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0
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Greater than 0 but less than 0.5
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0.5
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Greater than 0.5 but less than 1
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