152531 A battery is charged at a potential of $15 \mathrm{~V}$ in $8 \mathrm{~h}$ when the current flowing is $10 \mathrm{~A}$. The battery on discharge supplies a current of $5 \mathrm{~A}$ for $15 \mathrm{~h}$. The mean terminal voltage during discharge is $14 \mathrm{~V}$. The watt- hour efficiency of battery is
152531 A battery is charged at a potential of $15 \mathrm{~V}$ in $8 \mathrm{~h}$ when the current flowing is $10 \mathrm{~A}$. The battery on discharge supplies a current of $5 \mathrm{~A}$ for $15 \mathrm{~h}$. The mean terminal voltage during discharge is $14 \mathrm{~V}$. The watt- hour efficiency of battery is
152531 A battery is charged at a potential of $15 \mathrm{~V}$ in $8 \mathrm{~h}$ when the current flowing is $10 \mathrm{~A}$. The battery on discharge supplies a current of $5 \mathrm{~A}$ for $15 \mathrm{~h}$. The mean terminal voltage during discharge is $14 \mathrm{~V}$. The watt- hour efficiency of battery is
152531 A battery is charged at a potential of $15 \mathrm{~V}$ in $8 \mathrm{~h}$ when the current flowing is $10 \mathrm{~A}$. The battery on discharge supplies a current of $5 \mathrm{~A}$ for $15 \mathrm{~h}$. The mean terminal voltage during discharge is $14 \mathrm{~V}$. The watt- hour efficiency of battery is