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Electric Circuits

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

 Triangle
 Semicircle
 Circle
 Straight line

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Electric Circuits
For same voltage, the ratio resistance of 100 W lamp to resistance of 25 W lamp is

 1.
 1/4.
 4.
 16.

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Electric Circuits
The active and reactive power in an AC circuit are 10W and 20VAR respectively. What is the power factor?

 0.577.
 0.5.
 0.866.
 1.

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Electric Circuits
Twelve 6 Ω resistor used as edge to form a cube. The resistance between two diagonally opposite corner of the cube is

 5 / 6 Ω.
 6 / 5 Ω.
 5 Ω.
 6 Ω.

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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 / 2.
 R / 6.
  R / 3.
 R / 4.

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Electric Circuits
Condition of symmetry in Z-parameter representation is

 Z12 = Z22.
 Z11 = Z12.
 Z12 = Z21.
 Z11 = Z22.

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MORE MCQ ON Electric Circuits

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