Question

An electric iron works on 230v.A current of 3a flows through this for half an hour.Calculate the amount of heat energy generated

Answer 1

Answer:

124.2KJ

Explanation:

v=230v I=3a t=1800 sec

so,

P=VI

so power= 230×3=690w

heat is energy =p x t

I.e. 690×1800= 124200 J