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Electric Circuits

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

 Voltage.
 Power factor.
 Current.
 All of above.

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Electric Circuits
A series RLC circuit is connected across a 240V, 50 Hz supply. When the voltage across capacitor is 250V, a maximum current of 0.5A flows in the circuit. Find the inductance.

 6.37 µF.
 0.47 µF.
 2.25 µF.
 1.58 µF.

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Electric Circuits
A 100 μF capacitor supplied from 3 V source with a frequency of 50 Hz. The capacitive reactance is

 15.92 Ω.
 31.84 Ω.
 63.68 Ω.
 7.96 Ω.

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Electric Circuits
In steady state condition capacitor acts as a

 open circuit
 voltage source
 short circuit
 current source

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Electric Circuits
In series RLC circuit, voltage across resistor, inductor and capacitor are 5V, 2V and 2V respectively. Find total voltage?

 2V
 5V
 4V
 9V

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Electric Circuits
Electrics supply for electroplating should be

 low frequency ac voltage.
 low AC voltage.
 DC voltage.
 any of above.

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