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A battery is charged at a potential fo 1...

A battery is charged at a potential fo 15 V for 8 h when the current folwing is 10A. The battery on discharge supplies a current of 5A fo 15h . The mean terminal voltage during discharge is 14V. The watt-hour efficiency of the battery is

A

`80%`

B

`90%`

C

`87.5%`

D

`82.5%`

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Verified by Experts

The correct Answer is:
C
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