Question

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

• A. $5000J$
• B. $1000J$
• C. $15000J$
• D. $9000J$

Answer 1

Answer: (C)

$15000J$

$H=I^{2}Rt$
$=25\times 20\times 30=15000J$