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A battery is charged at a potential of 15V for 8 hours when the current flowing is 10A. The battery on discharge supplies a current of 5A for 15 hours. The mean terminal voltage during discharge is 14V. The “watt-hour” efficiency of the battery is
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- 87.5%
- 82.5%
- 80%
- 90%
Correct Option: A
| Efficiency is given by η - | |
| input |
| = | = 0.875 or 87.5% | |
| 10 x 8 x 15 |
