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The potential at a point $x$ (measured in $μ\ m$) due to some charges situated on the $ x$-axis is given by $V(x)$ =$\frac{{20}}{{{x^2} - 4}}$ $volt$ The electric field $E$ at $x = 4\ μ m$ is given by
  • A$\frac{{10}}{9}$ $\frac{V}{{\mu m}}$ and in the $+ve\ x$ direction
  • B$\;\frac{5}{3}$ $\frac{V}{{\mu m}}$ and in the $-ve\ x$ direction
  • C$\;\frac{5}{3}$ $\frac{V}{{\mu m}}$ and in the $+ve\ x$ direction
  • D$\;\frac{{10}}{9}$ $\frac{V}{{\mu m}}$  and in the $-ve\ x$ direction
AIEEE 2007, Medium
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