Physics - Current Electricity Question with Solution | TestHub

The length of potentiometer wire is$600\mathrm{ }\mathrm{c}\mathrm{m}$and a current of$\mathrm{40 }\mathrm{m}\mathrm{A}$is flowing in it. When a cell of emf$\mathrm{2 }\mathrm{V}$and internal resistance$10\mathrm{ }\mathrm{\Omega }$is balanced on this potentiometer the balance length is found to be$500\mathrm{ }\mathrm{c}\mathrm{m}$. The resistance of potentiometer wire will be