| 1. | Which of the following is linear and bilateral parameter ? | |
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electron tubes
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transistor
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resistors
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semi-conductor diodes
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Report Question| 2. | The period of a sine wave is 1/50 seconds. Its frequency ? | |
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40 Hz
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50 Hz
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20 Hz
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30 Hz
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| 3. | In a pure resistive circuit ? | |
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current can lead or lag the volt age by 90
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current leads the voltage by 90º
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current lags behind the voltage by 90
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current is in phase with the voltage
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| 4. | In a purely inductive circuit ? | |
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apparent power is zero
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none of above is zero
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actual power is zero
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reactive power is zero
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| 5. | In a series R-L-C circuit at the resonant frequency the ? | |
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impedance is maximum
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voltage is maximum
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current is maximum
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current is minimum
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| 6. | If resistance is 20 ? and inductance is 2H in a R-L series circuit, time constant of this will be ? | |
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10 s
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100 s
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0.001 s
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0.1 s
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| 7. | Capacitors for power factor correction are rated in ? | |
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KV
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KVAR
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KW
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KVA
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| 8. | Kirchhoff's current law is applicable to only ? | |
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electric circuits
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electronic circuits
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junction in a network
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closed loops in a network
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| 9. | The form factor is the ratio of ? | |
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average value to r.m.s. value
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peak value to r.m.s. value
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r.m.s. value to average value
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average value to r.m.s. value
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