Answer & explanation
Correct answer: option 4
$ E = -\frac{dV}{dx} = -\frac{20\times -2x}{(x^2-4)^2}$
$ \text{ At x = }4\mu m , E = \frac{10}{9} V/\mu m $
$\text{E is along +ve X-Axis}$
Correct answer: option 4
$ E = -\frac{dV}{dx} = -\frac{20\times -2x}{(x^2-4)^2}$
$ \text{ At x = }4\mu m , E = \frac{10}{9} V/\mu m $
$\text{E is along +ve X-Axis}$