Current Electricity Ques 4
4. A car battery has e.m.f. $12$ volt and internal resistance $5 \times 10^{-2} \mathrm{ohm}$. If it draws $60$ $ \mathrm{amp}$ current, the terminal voltage of the battery will be
[2000]
(a) $15$ volt
(b) $3$ volt
(c) $5$ volt
(d) $9$ volt
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Answer:
Correct Answer: 4.(a)
Solution: (a) $E=V-I r $
$ 12=V-60 \times 5 \times 10^{-2} $
$ 12=V-3 $
$ \Rightarrow V=15 \text { volt }$
BETA
