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Electric Circuits

Electric Circuits
The energy stored by a capacitor is given by

 all of them.
 1/2 CV2.
 Q2 / 2C.
 1/2 QV.

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Electric Circuits
2) Two sinusoidal emfs are given as e1 = Asin(wt+45) and e2 = Bsin(wt-30). The phase difference between the two quantities in degrees is

 15.
 75.
 60.
 105.

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Electric Circuits
During charging, the electrolyte of a lead acid battery becomes

 there is no change in electrolyte.
 weaker.
 stronger.
 diluted with water.

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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 tie set matrix is

 N - 1.
 b - N + 1.
 N.
 b - N - 1.

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Electric Circuits
If 1 A current flows in a circuit, the number of electrons flowing through this circuit is

 1.6 × 1019
 0.625 × 10 - 19
 0.625 × 1019
 1.6 × 10 - 19

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Electric Circuits
The arrangement of 12 cells each of internal resistance 1.5 Ohm to give maximum current in external load resistance of 2 Ohm will be

 in 4 parallel rows each row having 3 cells in series.
 in 3 parallel rows each row having 4 cells in series.
 all 12 in series.
 all 12 in parallel.

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MORE MCQ ON Electric Circuits

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