$100 \,J$ of heat is produced each second in a $4\, \Omega$ resistance. Find the potential difference across the resistor.
$100 \,J$ of heat is produced each second in a $4\, \Omega$ resistance. Find the potential difference across the resistor.
Given $\quad H=100 J ; R =4 \Omega, t=1 s , V =?$
We know that $H = I ^{2} R t$, therefore,
$I=\sqrt{\frac{H}{R t}}=\sqrt{\frac{100}{4 \times 1}}=5 A$
Thus, the potential difference across the resistor,
$V = IR$
$=5 \times 4=20 V$
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