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Electric Circuits

Electric Circuits
For Norton’s equivalent circuit

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

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Electric Circuits
A dependent source can be

 a current source.
 a voltage source.
 both a voltage or a current source.
 neither a voltage nor a current source.

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Electric Circuits
Which of the following has no units?

 Magnetic susceptibility
 Permeability
 Moment of a magnet
 Permittivity

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Electric Circuits
Which of the following quantities consists of SI unit as WATT ?

 Current
 Charge
 Power
 Force

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Electric Circuits
The maximum value of a current wave is 2A. If the form factor of a current wave is 1.5 and the peak factor is 2.7, find the rms value in Amperes.

 1.57 A.
 1.414 A.
 0.741 A.
 0.494 A.

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Electric Circuits
A piece of copper and another piece of germanium are cooled from room temperature to 80K. The resistance of

 each of them decreases.
 each of them increases.
 copper decreases and germanium increases.
 copper increases and germanium decreases.

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