Electric field in a region is given by E =A x i +B y j, where A=10 V / m^2 and B=5 V / m^2. If the electric potential at a point (10,20) is 500 V,…

Electric field in a region is given by $\displaystyle \vec{E}=A x \hat{i}+B y \hat{j}$, where $\displaystyle A=10 \mathrm{~V} / \mathrm{m}^2$ and $\displaystyle B=5 \mathrm{~V} / \mathrm{m}^2$. If the electric potential at a point $\displaystyle (10,20)$ is $\displaystyle 500$ V , then the electric potential at origin is $\displaystyle \_\_\_\_$ V.