Question

From Joule's Law of heating, the heat produced, $H=$

• A. $\frac{I^2}{Rt}$
• B. $\frac{I^{2}R}{t}$
• C. $\frac{R^{2}I}{t}$
• D. $I^{2}Rt$

Answer 1

The correct option is D $I^{2}Rt$

Power produced in a resitor-

$P=I^{2}R$

Now for heat-

$H=Pt$

$t$; time

$\Rightarrow H=I^{2}Rt$

Joule's Law of Heating Equation. The heat produced in a conductor due to the flow of electric current through it varies directly as the square of the magnitude of current when the resistance offered by the conductor and the time of flow of electrical current is constant.