Question

An electric heater draws a current of 3.5 A at a p.d. of 250 V. Calculate the power consumed by 4 such heaters.

Answer 1

Given that:

I=3.5 A, V=250volt

Then using relation,

P=V I

=250 x 3.5=875 W

For four heaters,P=4 x 875=3500 W