Physics - Current Electricity Question with Solution | TestHub

In a Wheatstone's bridge, there resistances $\mathrm{P},\mathrm{Q}$ and $\mathrm{R}$ connected in the three arms and the fourth arm is formed by two resistances ${\mathrm{S}}_1$ and ${\mathrm{S}}_2$ connected in parallel. The condition for bridge to be balanced will be