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Question

# A given charge situated at a certain distance from an electric dipole in the end on position, experiences a force F. If the distance of the charge is doubled, the force acting on the charge will be :F/8F/42FF/2

A
F/8
B
2F
C
F/2
D
F/4
Solution
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#### The electric field at a distance r from the dipole is →E=K2Pr3, so E∝1r3Force on charge q is F=qE also F∝1r3 If distance r is doubled, then force will F′=F8

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