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Electric Circuits

Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The current in R is

 5.08 A.
 10.16 A.
 1.27 A.
 2.54 A.

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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.
 105.
 75.
 60.

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

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

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Electric Circuits
An electrical motor has rating of 10 MVA at 0.8 lag, represented as series RL circuit at a 50 MVA base. Find the impedance value?

 (3 + j4) pu
 (4 + j2 ) pu
 (4 + j3) pu
 (2 + j4) pu

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Electric Circuits
A 10Ω resistor is stretched to increase its length double. Its resistance will now be

 20 Ω.
 5 Ω.
 40 Ω.
 10 Ω.

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Electric Circuits
Which cell has the reversible chemical reaction?

 Carbon Zinc.
 Lead acid.
 Silver oxide.
 Mercury oxide.

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MORE MCQ ON Electric Circuits

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