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

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

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