JEE AdvancedElectrostaticsHard

Question

Two charges, each equal to q, are kept at x = - a and x = a on the x-axis. A particle of mass m and charge is placed at the origin. If charge q0 is given a small displacement (y << a) along the y-axis, the net force acting on the particle is proportional to

Options

A.y
B.- y
C.
D.

Solution


                

net force = 2Fsin
          
          ⇒ Fnet∝ y

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