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  • n identical cells, each of e.m.f   and internal resistance r, are joined in series to form a c

n identical cells, each of e.m.f \varepsilon  and internal resistance r, are joined in series to form a closed circuit. The potential difference across any one cell is
 

Option: 1

 Zero
 


Option: 2

\varepsilon


Option: 3

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


Option: 4

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


Answers (1)

best_answer

Current in circuit, \mathrm{i=\frac{n \varepsilon}{n r}=\frac{\varepsilon}{r}}

The equivalent circuit of one cell is shown in Fig.
The p.d across the cell is \mathrm{V_A-V_B=-\varepsilon+i r=-\varepsilon+\frac{\varepsilon}{r} \cdot r=0}

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shivangi.shekhar

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