A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A . The battery on discharge supplies a c

A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A . The battery on discharge supplies a current of 5 A for 15 hours . The mean erminal voltage during discharge is 14 V. The "Watt-hour" efficiency of the battery is
A. `82.5%`
B. `80%`
C. `90%`
D. `87.5%`

A battery is charged at a potential of 15 V for 8 hours when the current flowing is 10 A . The battery on discharge supplies a current of 5 A for 15 h

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