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Electric Circuits

Electric Circuits
What is Va in the below circuit?

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

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Electric Circuits
If the peak value of a sine wave is 100 V, then its RMS value will be

 70.7 V.
 100 V.
 63.6 V.
 88 V.

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Electric Circuits
Which quantity consists of a unit 1KWh ?

 Time
 Energy
 Power
 Charge

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Electric Circuits
A current of 4 A flows in an ac circuit when 100 V dc is applied to it whereas it takes 250 v ac to produce the same current the power factor of the circuit is

 0.85.
 0.4.
 10.
 1.

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Electric Circuits
In a delta network each element has value R. The value of each element in equivalent star network will be

 R / 6.
 R / 4.
  R / 3.
 R / 2.

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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

 2:4:6.
 6:4:2.
 2:3:6.
 6:3:2.

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