A (rms) AC source is connected

PHYSICS · Multi-part · CBSE · Physics · Alternating Current · Alternating Current

Problem

220\,\text{V}

(rms) AC source is connected, one at a time, to two purely resistive loads:

R_1 = 20\,\Omega

and

R_2 = 80\,\Omega

. Assume the source voltage is perfectly sinusoidal. (i) For each resistor, calculate the peak value of the current. (ii) For each resistor, calculate the average power dissipated. (iii) Obtain the ratio of the powers

P_{R_1}:P_{R_2}

and comment briefly on the result.

Related theory

AC Fundamentals
Alternating current
Mean and RMS values
AC applied to a resistor

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