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A storage battery has e.m.f. $15 \mathrm{volts}$ and internal resistance $0.05 \mathrm{ohm}$. Its terminal voltage when it is delivering 10 ampere is
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The correct answer is:
14.5 volts
$V=E-I R=15-10.0 .05=14.5 \mathrm{~V}$
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