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• Topic:

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The electric potential V at any point O (x, y, z all in metres) in space is given by $V=4{x}^{2}\text{\hspace{0.17em}}volt$. The electric field at the point $\left(1m,\text{\hspace{0.17em}}0,\text{\hspace{0.17em}}2m\right)$ in volt/metre is

(1) 8 along negative x-axis

(2) 8 along positive x-axis

(3) 16 along negative x-axis

(4) 16 along positive z-axis