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 terminal voltage during discharge is 14 V. The "Watt-hour" efficiency of the battery is
Text Solution
Verified by ExpertsThe correct answer is:
D
The power of the battery, when charged, is given by 
The electrical energy dissipated is given by 
i. e., 
Similarly, the electrical energy dissipated during the discharge of battery is given by 
Hence, watt-hour efficiency of the battery is given by 
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