Question

The resistance of a 100 watt-220 volt bulb will be

Answer 1

Answer:

power = 100 watt.

Potential difference = 220 volts

We know that = Power = v × I

=> 100 = 220 × I

=> I = 100/220

= 10/22

And by ohms law = v = ir

=> r= v/ I

=> r = 220/10/22

=> r = 484 ohms