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Electric Circuits

Electric Circuits
Time constant of RL series circuit is

 L/R
 RC
 2L/R
 2RC

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Electric Circuits
If the dielectric of a capacitor is replaced by conducting material

 the capacitance value of the plate will decrease.
 the capacitor can store infinite charge.
 the plate will get short circuited.
 the capacitor will get heated up due to eddy currents.

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Electric Circuits
Which field is associated with the capacitor?

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

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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?

 30 V.
 60 V.
 50 V.
 20 V.

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Electric Circuits
In a series resonant circuit impedance is

 zero.
 maximum.
 minimum.
 none of these.

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

 2 V.
 0.5 V.
 None of these.
 1 V.

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