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Electric Circuits

Electric Circuits
When power factor angle is varying, the shape of the current locus is

 Straight line
 Triangle
 Semicircle
 Circle

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Electric Circuits
A coil with negligible resistance has 50 V across it with 10 mA. The inductive reactance is

 500 ohms.
 5000 ohms.
 1000 ohms.
 50 ohms.

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Electric Circuits
To obtain high efficiency, network is designed with which of the following?

 Zero Q factor
 Unity Q factor
 High Q factor
 Low Q factor

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Electric Circuits
What is the reactive power in AC operation?

 Apparent power × cosθ.
 Real power × cosθ.
 Real power × sinθ.
 Apparent power × sinθ.

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Electric Circuits
What is the SI unit of electric current ?

 Ampere.
 Ohm.
 Faraday.
None of these

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Electric Circuits
A two port network is defined by the relation The value of Z12 is

 -3.
 2/31.
 3/41.
 3.

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