Answer :

Given: missing


For the electric force to be minimum, the magnitude of charge on the particles must be minimum. As both the particles are charged, they must have non-zero minimum charge.


Hence, they both must carry charge having magnitude of fundamental unit of charge i.e. 1.6 × 1019 C.


Magnitude of charges,


Distance between the charged particles,


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Formula used:


By Coulomb’s law, the electric force is given by:



Where ϵ0 is the permittivity of free space


k is the electrostatic constant


q1 and q2 are the magnitude of charges


r is the distance of separation between the charges


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The magnitude of electric force is:






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