Two ideantical point charges are placed at a separation of `d`. `P` is a point on the line joining the charges, at a distance `x` from any one charge. The field at `P` is `E, E` is plotted against `x` for value of `x` from close to zero to slightly less then `d`. Which of the following represents the resulting curve

Options

A.
B.
C.
D.

Answer

4

Explanation

At `x = (d)/(2) , E = 0`
`0 lt x lt d//2 , E` is towards `+ve x`-axis
`0 lt x lt d , E` is towards `-ve x`-axis
`x rarr 0 , E rarr oo, x rarr d , E rarr -oo`