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Electric Circuits

Electric Circuits
How many coulombs of charge flow through a circuit carrying a current of 10 A in 1 minute?

 60
 1200
 10
 600

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Electric Circuits
A capacitor of 50 microfarad is connected in series with a resistance of 120 Ω. If above circuit is connected across 240 V, 50 Hz 1 - φ supply. Find the capacitive reactance?

 1.765 Ω.
 63.7 Ω.
 0.015 Ω.
 135.86 Ω.

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Electric Circuits
For Norton’s equivalent circuit

 Voc = Req /Isc.
 Isc = Voc Req.
 Voc = Isc / Req.
 Isc = Voc / Req.

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Electric Circuits
Purpose of using capacitor is / are

 all of these.
 to do phase split in AC 1 phase motor.
 effect DC filter in electronic circuit.
 increase p.f of inductive load circuit.

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Electric Circuits
Cascade connection of two port networks is analyzed through

 Y parameters.
 h parameters.
 ABCD parameters.
 Z parameters.

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Electric Circuits
The resistance of a strip of copper of rectangular cross section is 2 Ω. A metal of resistivity twice that of a copper is coated on its upper surface to a thickness equal to that of copper strip. The resistance of composite strip will be

 3 / 2 Ω.
 3 / 4 Ω.
 6 Ω.
 4 / 3 Ω.

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