Physics - Current Electricity Question with Solution | TestHub

$\mathrm{i}=\frac{12}{\mathrm{R}+5}$

Potential difference across$\mathrm{R}=2\mathrm{ }\mathrm{V}=\frac{12}{\mathrm{R}+5}\times \mathrm{ }\mathrm{R}$

$\therefore \mathrm{ }2=\frac{12}{\mathrm{R}+5}\times \mathrm{ }\mathrm{R}$

$\Rightarrow \mathrm{ }\mathrm{R}+5=6\mathrm{ }\mathrm{R}$

$\Rightarrow \mathrm{ }\mathrm{R}=1\mathrm{ }\mathrm{\Omega }$