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Electric Circuits

Electric Circuits
Capacitor does not allow the sudden change of

 current
None of these
 voltage
 power

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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

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

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Electric Circuits
Three capacitors each of capacity C are given. The resultant capacity (2/3) C can obtained by using them

 two in series and third in parallel across this combination.
 all in parallel.
 all in series.
 two in parallel and third in series with this combination.

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Electric Circuits
The alternative names for active power is/are

 average power.
 true power.
All of these
 real power.

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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?

 10 Hz.
 100 Hz.
 1000 Hz.
 1 Hz.

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Electric Circuits
Emf induced in a coil rotating in a uniform magnetic field will be maximum when the

 rate of cutting flux by coil sides is minimum.
 flux linking with the coil is maximum.
 rate of change of flux linkage is minimum.
 rate of change of flux linkage is maximum.

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MORE MCQ ON Electric Circuits

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