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Electric Circuits

Electric Circuits
Energy efficiency during electroplating is usually in the range

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

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Electric Circuits
Three parallel resistive branches are connected across a DC supply. The ratio of the branch resistances are given as R1:R2:R3 :: 2:4:6. The ratio of the branch currents is

 2:3:6.
 6:4:2.
 2:4:6.
 6:3:2.

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Electric Circuits
In given figure, the value of resistance R in Ω is

 2.5 Ω
 4.5 Ω
 3.5 Ω
 1 Ω

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Electric Circuits
A capacitor carries a charge of 0.1 C at 5 V. Its capacitance is

 0.05 F
 0.2 F
 0.5 F
 0.02 F

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Electric Circuits
The average value of half wave rectified sinusoidal current waveform, whose maximum value is 1A is

 0.5 A.
 1 A.
 0.637 A.
 0.318 A.

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Electric Circuits
A 10 μF capacitor and 100 W, 220 V lamp is connected in series across a 220 V alternating supply. In which frequency of the supply the lamp will glow brightest?

 10 Hz.
 100 Hz.
 1000 Hz.
 1 Hz.

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MORE MCQ ON Electric Circuits

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