Question

A light bulb operating at a dc voltage of 120 V has a power rating of 60 W. How much current is flowing through this bulb

Answer 1

• Voltage=V=120V
• Power=P=60W

• Current=I

$\\ \rm\rightarrowtail I=\dfrac{P}{V}=\dfrac{60}{120}=\dfrac{1}{2}=0.5A$