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Electric Circuits

Electric Circuits
What will be the rms value of rectangular wave with amplitude 10 V?

 10 V.
 11.2 V.
 7.7 V.
 5√2 V.

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Electric Circuits
If a resistor and a capacitor are connected to form series R - C circuit across a voltage source. If frequency of voltage source increases

 the current decreases abruptly.
 the current decreases.
 the current increases.
 the current remain unaltered.

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Electric Circuits
Current efficiency in electroplating is usually

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

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Electric Circuits
The indication of the state of charge of a battery is best given by

 colour of electrolyte.
 level of electrolyte.
 specific gravity of electrolyte.
 temperature of electrolyte.

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Electric Circuits
In the circuit given, I = 1 A for Is = 0. What is the value of I for Is = 2 A ?

 4 A.
  2 A.
 3 A.
 1 A.

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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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