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Electric Circuits

Electric Circuits
In direct arc furnace which of following is of high value?

 Power factor.
 Voltage.
 All of above.
 Current.

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Electric Circuits
If emf in a given circuit is given by e = 100 sinω0t, then maximum value of voltage and frequency will be

 100√2 V, 100 Hz.
 50√2 V, 100 Hz.
 100 V, 50 Hz.
 100 V, 100 Hz.

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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

 0.1 μF.
 0.001 μF.
 0.01 μF.
 1 μF.

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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
 10 µF
 1 µF
 25 µF

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Electric Circuits
Internal resistance of ideal current source is

 finite
 zero
 infinite
 100 ohms

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Electric Circuits
In series RLC circuit what is the power factor just bellow the resonance frequency?

 Unity
 Leading
 Zero
 Lagging

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