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Electric Circuits

Electric Circuits
Four capacitors each of 40 µF are connected in parallel, the equivalent capacitance of the system will be

 160 µF
 10 µF
 5 µF
 40 µF

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Electric Circuits
A star connected load has three equal impedance each of (40 + j30) Ω If the line current is 5 A then value of line voltage is

 250 V.
 250 √3 V.
 200 V.
 250 / √3 V.

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Electric Circuits
Flux in a magnetic circuit can be compared in an electric circuit to

 resistance.
 inductance.
 current.
 voltage.

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Electric Circuits
An AC voltage of 200 V at 50 Hz is applied to a coil which draws 5 A and dissipates 1000 W. The resistance and impedance of the coil respectively are

 40 Ω and 40 Ω.
 25 Ω and 5 Ω.
 40 Ω and 200 Ω.
 50 Ω and 200 Ω.

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Electric Circuits
For steady state current inductor acts as

 Voltage source
 Current source
 Short circuit
 Open circuit

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

 2 msec
 4 msec
 1 μsec
 2 μsec

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