An external resistance ' $R$ ' is connected to a cell of internal resistance ' $r$ '. The maximum po

Question

An external resistance ' $R$ ' is connected to a cell of internal resistance ' $r$ '. The maximum power transfer to the external resistance takes place when\

Professor PC Thomas Classes · Answer

$I=\frac{E}{R+r}$, $P=I^{2} R=\left(\frac{E}{R+r}ight)^{2} R$\ find $\frac{\mathrm{dp}}{\mathrm{dR}}$ and equate to zero.\