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Electric Circuits

Electric Circuits
Find the current through 5 Ohm resistor from A to B.

 1A.
 -1A.
 2A.
 -2A.

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

 50.5 V.
  31.9 V.
  39.1 V.
 45.5 V.

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Electric Circuits
If emf in a given circuit is given by e = 100 sinω0t, then maximum value of voltage and frequency will be

 100√2 V, 100 Hz.
 100 V, 100 Hz.
 50√2 V, 100 Hz.
 100 V, 50 Hz.

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Electric Circuits
Given network is having N nodes and b branches, then number of individual loops are

 N.
 b - N + 1.
 N - 1.
 b - N - 1.

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Electric Circuits
The active and reactive power in an AC circuit are 10W and 20VAR respectively. What is the power factor?

 0.866.
 1.
 0.577.
 0.5.

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Electric Circuits
A 50 μF capacitor is charged to retain 10 MJ of energy by a constant charging current of 1 A. Determine the voltages across the capacitor?

 20 V.
 60 V.
 50 V.
 30 V.

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MORE MCQ ON Electric Circuits

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