1.

Charged of +6 nC and -15n C,when separated by a certain distance , attract each other by a force F. If an additional charges of + 9 muCis given to each of the two charges and separation between them is kept unchanged, the force between them will still be an attractive force of magnitude F.

Answer»

SOLUTION :True - intial FORCE F = `(1)/(4pi in _0)([+6XX 10^(-9)][-15xx10^(-9)])/(r^(2)) `
and final force F. ` =(1)/(4pi in _0) = ([+15xx10^(-9)][-6xx10^(-9)])/(r^(2)) =F.`


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