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Electric Circuits

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

 Circle
 Semicircle
 Straight line
 Triangle

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Electric Circuits
Three element having conductance G1, G2 and G3 are connected in parallel. Their combined conductance will be

 (1 / G1 + 1 / G2 + 1 / G3) - 1.
 G1 + G2 + G3.
 1 / G1 + 1 / G2 + 1 / G3.
 (G1 + G2 + G3) - 1.

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Electric Circuits
Condition of symmetry in Z-parameter representation is

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

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Electric Circuits
Average power taken by the pure capacitor is

 Any of the above
 Zero
 Maximum
 Minimum

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Electric Circuits
In a series resonant circuit impedance is

 none of these.
 maximum.
 minimum.
 zero.

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Electric Circuits
The resistance of a conductor of diameter d and length l is R Ω. If the diameter of the conductor is halved and its length is doubled, the resistance will be

 R Ω
 4R Ω
 2R Ω
 8R Ω

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