For point charges and placed on |ElectrostaticsJEEMAIN2019

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JEE MAIN 2019

09-04-2019 S2

Question

For point charges $-q,+q,+q$ and $-q$ are placed on $y$-axis at $y=-2 d, y=-d, y=+d$ and $y=+2 d$, respectively. The magnitude of the electric field $E$ at a point on the $x$-axis at $x=D$, with $D \gg d$, will behave as:

Select the correct option:

A

$E \propto \frac{1}{D^3}$

B

$E \propto \frac{1}{D}$

C

$E \propto \frac{1}{D^4}$

D

$E \propto \frac{1}{D^2}$

✓ Correct! Well done.

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