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Electric Circuits

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

 60.
 75.
 105.
 15.

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Electric Circuits
Active element of electrical circuit is

 current source.
 voltage source.
 none of above.
 both of them.

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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.
 N - 1.
 b - N + 1.
 b - N - 1.

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Electric Circuits
Inductor does not allow the sudden change of

None of these
 current
 voltage
 power

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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

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

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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 average value in Amperes.

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

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