In the balanced condition, the values of the resistances of the four arms of a wheatstone bridge are shown in figure below. The resistance $R_3$ has temperature coefficient $\alpha =KT°C^{-1}$ where $K=0.0008$ and T is temperature in$°C$. If the temperature of only $R_3$  is increased by $10°C$, then [Take initial temperature $0°C$ ; Resistance of voltmeter V is very large]