Question

A 120 watt bulb is a connected to a 48v line what is the current the flows in the bulb

Answer 1

• Power=P=120W
• Voltage=V=48V
• Current=I

$\\ \sf\Rrightarrow P=VI$

$\\ \sf\Rrightarrow 120=48I$

$\\ \sf\Rrightarrow I=120/48$

$\\ \sf\Rrightarrow I=2.5A$