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Two charge, each of q, are kept x = - a ...

Two charge, each of q, are kept x = - a and x= a on the x axis. A particle of mass m and charge `q_0 = q/2` is placed at the origin . If charge `q_0` is given a small displacement`(y let let a) along y axis . The net force acting on the particle is proportional to :

A

y

B

`-y`

C

`1/y`

D

`-1/y`

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The correct Answer is:
A
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