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Electric Circuits

Electric Circuits
A branch of a network is said to be active when it consists of one

 capacitor.
 inductor.
 resistor.
 voltage source.

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Electric Circuits
What is the reactive power in AC operation?

 Apparent power × cosθ.
 Real power × cosθ.
 Apparent power × sinθ.
 Real power × sinθ.

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Electric Circuits
In above question, determine the current if E = 100 V, R = 20Ω, R1 = 10 Ω and L = 2 H at 0.5 sec after short circuit.

 - 6.28.
 9.59.
 - 9.59.
 6.98.

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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.
 b - N + 1.
 N.

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Electric Circuits
In a capacitor, the electrical energy is stored in

 none of above.
 electric field.
 magnetic field.
 both ‘electric field’ and magnetic field’.

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Electric Circuits
A 35 V source is connected to a series circuit of 600 Ω and R as shown. If a voltmeter of internal resistance 1.2 kΩ is connected across 600 Ω resistor, it reads 5 V. The value of R is

 7.2 k Ω.
 3.6 k Ω.
 2.4 k Ω.
 1.2 k Ω.

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