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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Electric Circuits
A battery of E Volts is supplying a steady current to a series circuit of total resistance RΩ and inductance L Henry. A part R1 of the total resistance is suddenly short circuited. Find the expression for current flowing through the battery subsequent to the operation.

 i = {E / R1 - R)}(1- e - (R1 - R) t / L)
None of these
 i = {E / R}[1-(R1 / R) *e - {(R - R1 )*t/L}
 i = {E / (R - R1)}[1-(R1 / R) *e- {(R - R1 )t/L}

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