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Electric Circuits

Electric Circuits
When power factor angle is constant, then shape of the current locus is

 triangle.
 straight line.
 semi circle.
 circle.

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Electric Circuits
Efficiency of electrical machines should be calculated by measuring

 losses and input.
 losses.
 output and input.
 losses and output.

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Electric Circuits
Internal resistance of ideal current source is

 finite
 100 ohms
 infinite
 zero

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Electric Circuits
A series circuit consists of R = 20 Ω, L = 20 mH, and AC supply 60 V with f = 100 Hz. The voltage drop across L is

  31.9 V.
 50.5 V.
 45.5 V.
  39.1 V.

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Electric Circuits
Given network is having N nodes and B branches, then number of twigs are

 B - N - 1.
 B - N + 1.
 N - 1.
 N.

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Electric Circuits
A wire of resistance R has it length and cross - section both doubled. Its resistance will become

 0.5R.
 2R.
 R.
 4R.

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MORE MCQ ON Electric Circuits

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