A) 6 W
B) 3 W
C) 9 W
D) 15 W
Correct Answer: B
Solution :
The internal resistance of battery is given by \[r=\left( \frac{E}{V}-1 \right)R=\left( \frac{40}{30}-1 \right)\times 9\]\[=\frac{9\times 10}{30}=3\,\Omega \]You need to login to perform this action.
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