Question

A current of 0.2 A flows through a wire whose ends are at a potential difference of 20 V. Calculate the heat energy produced in 1 minute.

Answer 1

Here I = 0.2 A,

V = 20 V,

t = 1 min = 60 sec

The heat energy produced in 1 min. W = VI t

= `[20 xx 2/10 xx 60]`

W = 240 J