Magnetic fields (A-level only)

Medium

A direct current $I$ dissipates thermal power $P$ in a calibration resistor of resistance $R$ .

In a second setup, an alternating current with a peak current of $3 I$ is passed through a different resistor of resistance $23R\frac{2}{3}R$ .

What is the average power dissipated in this second resistor?

$P$

$3 P$

$92P\frac{9}{2}P$

$6 P$

Magnetic fields (A-level only) Questions