Question

A 100 $\Omega$ resistor is connected to a 220 V, 50 Hz ac supply.(a) What is the rms value of current in the circuit?

(b) What is the net
power consumed over a full cycle?

Answer 1

(a)

The rms value of current is $I_{rms}=\frac{V_{rms}}{R}=\frac{220V}{100\Omega }=2.2A$

(b)

Net power is given by
$P=\frac{V^2}{R}=\frac{{220}^2}{100}=484W$