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Electric Circuits

Electric Circuits
In a series resonant circuit impedance is

 zero.
 none of these.
 minimum.
 maximum.

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Electric Circuits
Coating generally recommended for hard surfacing is

 copper plating.
None of these
 lead plating.
 chromium plating.

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

 b - N + 1.
 b - N - 1.
 N - 1.
 N.

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Electric Circuits
An alternating voltage = 140 sinθ is supplied to a device which offers a resistance of 20 Ω in forward direction of current in reverse direction. Calculate the form factor.

 1.11.
 0.318.
 1.414.
 0.57.

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Electric Circuits
The form factor of sinusoidal alternating current is

 0.
 1.
 1.11.
 1.15.

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Electric Circuits
A coil of negligible resistance has an induction of 100 mH. The current passing through the coil changes from 2 A to 4 A at a uniform rate in 0.1 sec the voltage across the coil during this time would be __________ V.

 36
 2
 50
 8

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