Electric Circuits
An AC voltage of 200 V at 50 Hz is applied to a coil which draws 5 A and dissipates 1000 W. The resistance and impedance of the coil respectively are

 50 Ω and 200 Ω.
 25 Ω and 5 Ω.
 40 Ω and 40 Ω.
 40 Ω and 200 Ω.

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

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

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