Physics - Current Electricity Question with Solution | TestHub

A circuit consists of three batteries of emf $E_1=1\mathrm{V},E_2=2\mathrm{V}$ and $E_3=3\mathrm{V}$ and internal resistances $1\Omega ,2\Omega$ and $1\Omega$ respectively which are connected in parallel as shown in the figure. The potential difference between points $P$ and $Q$ is