The electric potential $V$ at any point $O$ ($x$, $y$, $z$ all in metres) in space is given by $V = 4{x^2}\,volt$. The electric field at the point $(1m,\,0,\,2m)$ in $volt/metre$ is
  • A$8$ along negative $X - $ axis
  • B$8$ along positive $X - $ axis
  • C$16$ along negative $X - $ axis
  • D$16$ along positive $Z - $ axis
IIT 1992, Medium
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