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Electric Circuits

Electric Circuits
The strength of current in 1 H inductor changes at rate of 1 A / sec. Find the voltage across it?

 0.5 V.
 2 V.
 1 V.
 None of these.

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Electric Circuits
A wire 2.5 m long is bent into a square. An current of 100 A flowing through the wire will produce a magnetizing force at the center of the square, equal to

 222 AT / m.
 196 AT / m.
 72 AT / m.
 144 AT / m.

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Electric Circuits
In RL series circuit R=2Ω and L=2mH. What is the value of time constant?

 1msec
 2msec
 100sec
 4msec

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Electric Circuits
Which field is associated with the capacitor?

 Electric.
 Both of (A) and (B).
 None of above.
 Magnetic.

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Electric Circuits
Reciprocity condition for h parameters is

 h11h22 - h21h12 = 0.
 h12 = h21.
 h12 = h21.
 h12 = - h21.

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Electric Circuits
The rms value of sinusoidal voltage wave V = 200sinω0t

 200 V.
 100√2 V.
 100 V.
 200√2 V.

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