Question

$100$ J of heat is produced each second in a $4\Omega$ resistor. Find the potential difference across the resistor.

Answer 1

Given,

$R=4\Omega ,Heat=100j$

We know that,

$Heat=\frac{v^{2}t}{R}\Rightarrow 100=\frac{V^2\times 1}{4}\Rightarrow V^2=400\Rightarrow V=20v$