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Electric Circuits

Electric Circuits
For the resonance circuit ω0 = 105, Q = 50, R = 400 Ω the value of C is

 1000 pF.
 500 pF.
 250 pF.
 125 pF.

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Electric Circuits
In the circuit shown in the figure, the value of Vs is 0, when I = 4 A. The value of I, when Vs = 16 V, is

 6 A.
 8 A.
 10 A.
 12 A.

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Electric Circuits
A current of 4 A flows in an ac circuit when 100 V dc is applied to it whereas it takes 250 v ac to produce the same current the power factor of the circuit is

 0.85.
 10.
 1.
 0.4.

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Electric Circuits
Which of following capacitors has relatively shorter shelf life?

 both (B) and (C) above.
 Glass.
 Paper.
 Electrolytic.

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Electric Circuits
Coating generally recommended for hard surfacing is

 copper plating.
 chromium plating.
 lead plating.
None of these

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Electric Circuits
In the given figure, the Thevenins equivalent voltage and impedance as seen from the terminals P - Q is given by

 2 V and 5 Ω.
 4 V and 7.5 Ω.
 4 V and 5 Ω.
 2 V and 7.5 Ω.

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