Physics - Current Electricity Question with Solution | TestHub

A cell of emf $E$ is connected to a resistance $R_1$ for time $t$ and the amount of heat generated in it is $H$. If the resistance $R_1$ is replaced by another resistance $R_2$ and is connected to the cell at the same time $t,$ the amount of heat generated in $R_2$ is $4\mathrm{H}$. Then internal resistance of the cell is