Question

An electric heater of resistance 8 ohm draws 15 ampere from the service mains 2 hours .Calculate the rate at which heat is developed in the heater

Answer 1

Explanation:

given,

R=8 ohm

I=15A

T=2hrs

heat developed H=?

Formula

H=I square RT

H=15 square x 8 x2

H=4600J