The electric potential at any point P ( x, y, z ) is V = x^3 z - x^2 y -3 volts. The electric field E_Q at point Q (2,3,1) will be (in V / m ) -

The electric potential at any point $\displaystyle \mathrm{P}(\mathrm{x}, \mathrm{y}, \mathrm{z})$ is $\displaystyle \mathrm{V}=\mathrm{x}^3 \mathrm{z}-\mathrm{x}^2 \mathrm{y}-3$ volts. The electric field $\displaystyle \overrightarrow{\mathrm{E}_{\mathrm{Q}}}$ at point $\displaystyle \mathrm{Q}(2,3,1)$ will be (in $\displaystyle \mathrm{V} / \mathrm{m}$ ) -