Variation of electrostatic potential along the x - direction is shown in (Fig. 3.142). The correct statement about electric field is
.

Options

A. x - component at point `B` is maximum
B. x - component at point `A` is toward positive x - axis
C. x - component at point `C` is along negative x - axis
D. x - component at point `C` is along positive x - axis

Answer

d

Explanation

We know, `E = -(d V)/(d x)`.
At `B, dV//d x = 0`, hence `E_x = 0`
At `A, d V//d x` is positive, hence `E_x` is negative.
At `C, d V//dx` is negative, hence `E_x` is positive.