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Electric Circuits

Electric Circuits
If N is the number of nodes and b is the number of branches in a network, then rank of tie set matrix is

 N.
 b - N + 1.
 N - 1.
 b - N - 1.

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Electric Circuits
What is the unit of potential difference ?

 Watt
 Ohm
 Volt
 Ampere

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Electric Circuits
An equipotential surface is one which has all points at _____________ potential.

 different.
 zero.
 none of them.
 same.

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Electric Circuits
For Norton’s equivalent circuit

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

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Electric Circuits
The term trickle charge is associated with

 nickel iron battery.
 dry cell.
 silver zinc battery.
 lead acid battery.

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Electric Circuits
A balanced three Phase Y-connected load has one phase voltage VB = 277∠45o V. The phase sequence is RYB. The line to line voltage VRY is

 339∠- 45o V.
 480∠45o V.
 339∠45o V.
 480∠ - 45o V.

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