A Wheatstone bridge is initially at room temperature and all arms of the bridge have same value of resistances (R_1=R_2=R_3=R_4). When R_3 resistance…

A Wheatstone bridge is initially at room temperature and all arms of the bridge have same value of resistances $\displaystyle \left(R_1=R_2=R_3=R_4\right)$. When $\displaystyle R_3$ resistance is heated to some temperature, its resistance value has gone up by $\displaystyle 10 \%$. The potential difference $\displaystyle \left(V_a-V_b\right)$ (after $\displaystyle R_3$ is heated) is $\displaystyle \_\_\_\_$ V.