Question

When an electric heater draws a current of 8a ,the potential diffrence between it's terminal is 120v if the potential diffrence is decreased to 60v what will be the current drawn by the heater

Answer 1

Explanation:

if we find resistence of the heater we can easily solve this type of questions.

by ohms law

V=IR

120=8×R

R=120/8

again apply ohms law

60=120/8×I

I=4A