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  • n identical cells, each of e.m.f \varepsilon and internal resistance r, are joined in series to form a closed circuit. One cell A is joined with recersed polarity. The potential difference across e

n identical cells, each of e.m.f \varepsilon and internal resistance r, are joined in series to form a closed circuit. One cell A is joined with recersed polarity. The potential difference across each cell, except A, is
 

Option: 1

\mathrm{\frac{2 \varepsilon}{n}}


Option: 2

\mathrm{ \frac{n-1}{n} \varepsilon}


Option: 3

\mathrm{ \frac{n-2}{n} \varepsilon}


Option: 4

\mathrm{ \frac{2 n}{n-2} \varepsilon}


Answers (1)

best_answer

\begin{aligned} &\mathrm{ i=\frac{(n-2) \varepsilon}{n r} }\\ &\mathrm{ V_B-V_A=-i r+\varepsilon=\varepsilon-\frac{(n-2) \varepsilon}{n r} r=\varepsilon\left[1-\frac{n-2}{n}\right]=\frac{2 \varepsilon}{n} }\end{aligned}

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Divya Prakash Singh

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