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Electric Circuits

Electric Circuits
Condition of reciprocity in Y-parameter representation is

 Y12 = Y22.
 Y11 = Y12.
 Y11 = Y22.
 Y12 = Y21.

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Electric Circuits
Internal heating of a capacitor is usually attributed to

 electron movement.
 dielectric charge.
 plate vibration.
 leakage resistance.

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Electric Circuits
The Laplace Transform of a shifted unit step f (t) = U (t-a) is

 s(1-e-as).
 (e-as)/s.
 se-as.
 e-as.

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Electric Circuits
A capacitor carries a charge of 0.1 C at 5 V. Its capacitance is

 0.2 F
 0.5 F
 0.05 F
 0.02 F

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Electric Circuits
A balanced star connected load with impedance of 30j - 300 Ω is supplied from a 3 - phase, 4-wire, 173 V system, the voltages to neutral being 100j -900, 100j - 300 and 100j -1500 V. The current in neutral wire is

  8.85 A.
  50 A.
  5 A.
  zero.

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Electric Circuits
One atomic mass unit ( amu ) is approximately equal to

 1.6 × 10-24 Kg.
  1.6 × 10-27 Kg.
 1.6 × 10-13 Kg.
 1.6 × 10-19 Kg.

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