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Electric Circuits

Electric Circuits
Which material has extremely large resistance?

 Semiconductor
None of these
 Insulator
 Conductor

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Electric Circuits
Current magnification will occur in which of the following case?

 Series resonance
None of these
 Parallel resonance
 Both

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Electric Circuits
A capacitor passes a current of 12.6 mA when supplied with 20 V ac with a frequency of 1000 Hz. The capacitance will be

 0.01 μF.
 1 μF.
 0.1 μF.
 0.001 μF.

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Electric Circuits
A balanced 3 - φ star connected load is fed from a 208 V, 3 - φ supply. Each load has resistance of 35 Ω. The total power is

 1236 W.
 411.3 W.
 none of these.
 618 W.

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Electric Circuits
Five capacitors each of 5 µF are connected in series, the equivalent capacitance of the system will be

 5 µF
 25 µF
 10 µF
 1 µF

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Electric Circuits
2) Two sinusoidal emfs are given as e1 = Asin(wt+45) and e2 = Bsin(wt-30). The phase difference between the two quantities in degrees is

 105.
 15.
 75.
 60.

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