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Electric Circuits

Electric Circuits
Under resonance condition the power factor of a system is

 lagging
 leading
 unity
 any of the above

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Electric Circuits
The maximum value of a current wave is 2A. If the form factor of a current wave is 1.5 and the peak factor is 2.7, find the average value in Amperes.

 1.57 A.
 0.494 A.
 0.741 A.
 1.414 A.

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Electric Circuits
In an AC circuit, containing pure inductance, the voltage applied is 120 V, 50 Hz while the current is 10 A. Find the value of inductance.

 34 mH.
 35 mH.
 38 mH.
 30 mH.

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Electric Circuits
Inductor does not allow the sudden change of

 power
 voltage
 current
None of these

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Electric Circuits
Poorest conductor of electricity is

  Silver.
  Steel.
  Carbon.
  Aluminium.

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Electric Circuits
What is apparent power in AC operation?

 Product of rms voltage and rms current.
 Product of voltage and current.
 Product of voltage and current at full load.
 Product of voltage and current at no load.

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