Two similar very small conducting spheres having charges and are some distance apart

PHYSICS · Single correct · CBSE · Physics · Electric Charges and Fields · Electric Charges and Fields

Problem

Two similar very small conducting spheres having charges 40μC40 \mu\text{C} and −20μC-20 \mu\text{C} are some distance apart. Now they are touched and kept at the same distance. The ratio of the initial to the final force between them is: (a) 8:18 : 1 (b) 4:14 : 1 (c) 1:81 : 8 (d) 1:11 : 1

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