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Two point charges +8q and -2q are locate...

Two point charges `+8q` and `-2q` are located at `x=0` and `x=L` respectively. The location of a point on the x axis at which the net electric field due to these two point charges is zero is

A

`2L`

B

`L/4`

C

`8L`

D

`4L`

Text Solution

Verified by Experts

The correct Answer is:
A
Due to two charges of opposite nature, E will be zero on the line joining the two charges and nearer to the charge of simaller magnitude.

`(K8Q)/x^(2)=(K2q)/((x-L)^(2))rArr x=2L`
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