If a battery of emf and internal resistance is connected across a load of resistance

PHYSICS · Subjective · CBSE · Physics · Current Electricity · Current Electricity

Problem

If a battery of emf

E

and internal resistance

r

is connected across a load of resistance

R

, show that the rate at which energy is dissipated in

R

is maximum when

R=r

and that this maximum power is

P=\frac{E^2}{4r}