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Electric Circuits

Electric Circuits
For the network shown below when I = 0, V = 20 V and when R = 0, I = 10 A. If now R = 3 Ω what is the value of the current I?

 5 A.
 6 A.
 10 A.
 4 A.

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Electric Circuits
In RLC series circuit, at resonance condition the value of current is

 Minimum
 Maximum
None of these
 Zero

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Electric Circuits
If a function is shifted by 'T', then it is correctly represented as

 f (t) u (t-T).
 f (t-T) u (t-T).
 f (t-T) u (t).
 f (t) u (t).

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Electric Circuits
Five capacitors each of 5 µF are connected in series, the equivalent capacitance of the system will be

 10 µF
 25 µF
 1 µF
 5 µF

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Electric Circuits
A capacitor is connected to supply with switch and the switch is connected between capacitor and supply. Initially switch is open at time zero, and then switch is closed. Then how capacitor behaves at time t = 0+?

 short circuit.
 dielectric losses increases.
 dielectric losses decreases.
 open circuit.

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Electric Circuits
Current efficiency in electroplating is usually

  99 %.
  90 to 98 %.
  50 to 60 %.
  70 to 80 %.

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