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Electric Circuits

Electric Circuits
In RLC series circuit R = 2Ω, L = 2mH and C = 1μF. Find the time constant of the circuit?

 1 μsec
 2 msec
 4 msec
 2 μsec

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Electric Circuits
Energy efficiency during electroplating is usually in the range

 85 to 90%.
 80 to 85%.
 50 to 80%.
 90 to 99%.

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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?

 1 V.
 2 V.
 None of these.
 0.5 V.

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

 1
 Both 2 and 3
 ∞
 0

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Electric Circuits
Four resistances 80 Ohm, 50 Ohm, 25 Ohm and R are connected in parallel. Current through 25 Ohm resistance is 4A. Total current of supply is 10A. The value of R will be

 76.66.
 36.36.
 40.25.
 66.66.

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Electric Circuits
In RLC series circuit R = 2Ω, L = 2mH and C = 1μF and applied voltage is 10V DC. Then what is steady state current value?

 5A
 1A
 2A
 0A

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