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Electric Circuits

Electric Circuits
Current efficiency in electroplating is usually

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

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

 4.5 Ω
 1 Ω
 2.5 Ω
 3.5 Ω

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Electric Circuits
Two resistors R1 and R2 give combined resistance of 4.5 Ohm when connected in series and 1 Ohm when in parallel, the resistances are

 2.2 Ohm and 2.3 Ohm.
 2 Ohm and 2.5 Ohm.
 1.25 Ohm and 3.25 Ohm.
 1.5 Ohm and 3 Ohm.

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Electric Circuits
What is Va in the below circuit?

 (6R + 10) / 3.
 (6R - 10) / 3.
 (4R + 10) / 3.
 (3R + 10) / 3.

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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+?

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

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Electric Circuits
The greater the internal resistance of a cell

 the lesser the terminal voltage.
 the greater the terminal voltage.
 the greater the emf.
 the lesser the emf.

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MORE MCQ ON Electric Circuits

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