The internal resistances of two cells shown are $0.1\,\Omega $ and $0.3\,\Omega $. If $R = 0.2\,\Omega $, the potential difference across the cell
Medium
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Applying Kirchhoff law
$(2+2)=(0.1+0.3+0.2)$ $\mathrm{i}$
$\Rightarrow \mathrm{i}=\frac{20}{3} \mathrm{A}$
Hence potential difference across $\mathrm{A}$
$=2-0.1 \times \frac{20}{3}=\frac{4}{3} \mathrm{\,V}$ [ less than $ 2 \mathrm{\,V}$]
Potential difference across
$B=2-0.3 \times \frac{20}{3}=0$
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