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Q.

When $n$ cells are joined in parallel as shown, the strength of the current $i$ is given by

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a

$\frac{n E}{(\frac{R}{n}) + r}$

b

$\frac{E}{R + (r / n)}$

c

$\frac{E}{r + R n}$

d

$\frac{n E}{R + n r}$

answer is B.

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Detailed Solution

$I n p a r a l l e l c o m b i n a t i o n o f c e l l i = \frac{E}{R + \frac{r}{n}}$

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