Question

What is the operating resistance of a 100-watt household light bulb ? The operating line voltage of household electricity is
120V.​

Answer 1

For example, a 100 watt light bulb operating on 120 volts AC will have 144 ohms of resistance and will draw 0.833 Amps.

Answer 2

Explanation:

given:

P=100W

v=120v

R=?

from P=V^2/R

WE HAVE

R=V^2/P

=(120V)^2/100W

=144 ohm