Question

Find the resistance of a bulb which is marked 220v-100w

Answer 1

Answer:

484 ohm

Explanation:

P= (V^2)/R

so, R=(V^2)/P

where p= power, v= votage and r= resistance

here, p= 100 w and v= 220 v

so the resistance = (220^2)/100= 484 ohm