Two Small, identical in size, a charged metallic Sphere A and B reped each other with a Force F. when placed at a distance R between their centres the sphere A and B are touched by identical but uncharged sphere c and D Respectively which are then removed away. the sphere B is now Brought closer to A to A Distance R/2 between their centres. what is the new force of Replusion between A and B?
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Explanation:
answer is given in two pictures.
Answer : So net force is F
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