Question

An electric toaster of resistance $20\Omega$ takes a current of $5A$. Calculate the heat developed in $30s$.

Answer 1

Given : current $i=5A$ , resistance $R=20\Omega$ , time $t=30s$

Heat generated is given by $H=i^{2}Rt$

$H=5^2\times 20\times 30=15,000J$