Physics - Current Electricity Question with Solution | TestHub

A potentiometer wire has length of $5\mathrm{m}$ and resistance of $16\Omega$. The driving cell has an e.m.f. of $5\mathrm{V}$ and an internal resistance of $4\Omega$. When the two cells of e.m.f.s $1.3\mathrm{V}$ and $1.1\mathrm{V}$ are connected so as to assist each other and then oppose each other, the balancing lengths are respectively