First slide

Electrostatic potential

Question

Variation of electrostatic potential along x-direction is shown in the graph. The correct statement about electric field is:-

Moderate

A

x component at point B is maximum
B

x component at point A is towards 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

Solution

We know , $E = - \frac{d V}{d x}$
At point C , slope $\frac{d V}{d x}$ is negative
$∴ E = - \frac{d V}{d x} = Positive$
It means , x component of electric field at point C is along positive x-axis.

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