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Electric Circuits

Electric Circuits
In ideal system coefficient of coupling(k) is

 1
 0
 ∞
 Both 2 and 3

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Electric Circuits
There is a ________ between two nodes of signal flow graph

 branch
 tree
None of these
 link

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Electric Circuits
A 20 μF capacitor and 200 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow dimmest?

 100 Hz.
 10 Hz.
 1 Hz.
 1000 Hz.

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Electric Circuits
A wire of resistance R has it length and cross - section both doubled. Its resistance will become

 2R.
 R.
 0.5R.
 4R.

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Electric Circuits
A coil with negligible resistance has 50 V across it with 10 mA. The inductive reactance is

 50 ohms.
 500 ohms.
 5000 ohms.
 1000 ohms.

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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

 8 A.
 6 A.
 12 A.
 10 A.

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