Electric Circuits
A pole of driving point impedance is

 zero current for a finite value of driving current.
 zero current for a finite value of driving voltage.
 zero voltage for a finite value of driving current.
 zero voltage for a finite value of driving voltage.

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Electric Circuits
What is referred as the average value in AC opearation?

 Average of all values of the phase sequences.
 Average of all values of an alternating quantity.
  Average of all values of an alternating quantity over a complete cycle.
 Average of all values of the (+)ve and (-)ve half.

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