Question

A current 0.2A flows through a wire whose ends are at a potential difference of 15V. Calculate:
(I) the resistance of the wire , and
(2) the heat energy produced in 1minute

Answer 1

I=0.2 A ,V=15V , RESISTANCE=0.2/15=1/75 OHM
THE HEAT ENERGY=15^2×1/75=3J

Answer 2

resistence =15/0.2 =75 ohms

heat = l²rt
= 0.04 *75 * 60
= 180 joules