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Four objects W, X, Y and Z each with cha...

Four objects W, X, Y and Z each with charge `+q` are held fixed at four points of a square of side d as a shown in the figure . Object X and Z on the midpoints of the sides of the square . The electrostatic force exerted by object W on object X is F. Then the magnitude of the force exerted by object W on Z is .

A

`(F)/(7)`

B

`(F)/(5)`

C

`(F)/(3)`

D

`(F)/(2)`

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