Physics - Electrostatics Question with Solution | TestHub

The electric potential V is given as a function of distance x (metre) by $\mathrm{V}=\left(5{\mathrm{x}}^2+10\mathrm{x}-9\right)$ volt. Calculate the magnitude of electric field at $\mathrm{x}=1\mathrm{m}($ in $\mathrm{V}/\mathrm{m})$.