A) 82.5%
B) 80%
C) 90%
D) 87.5%
Correct Answer: D
Solution :
Input energy when the battery is charged \[=Vit\] \[=15\times 10\times 8=1200\,W-h\] Energy released when the battery is discharged \[=14\times 15\times 15=1050\,W-h\] Hence, W-h efficiency of battery is given by \[=\frac{\text{energy}\,\text{output}}{\text{energy}\,\text{input}}=\frac{1500}{1200}\] =0.875=87.5%You need to login to perform this action.
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