The output of a step down transformer is measured to be 24 V when connected to a 12 watt light bulb.

Question

The output of a step down transformer is measured to be 24 V when connected to a 12 watt light bulb. The value of the peak current is

Professor PC Thomas Classes · Answer

$I_{rms} = \frac{P}{V} = \frac{12}{24} = 0.5	ext{ A}$. Peak current $I_0 = I_{rms}\sqrt{2} = 0.5\sqrt{2} = \frac{1}{\sqrt{2}}	ext{ A}$.