2.31 Answer carefully:

(a) Two large conducting spheres carrying charges Q1 and Q2 are brought close to each other. Is the magnitude of electrostatic force between them exactly given by \frac{Q_{1}Q_{2}}{4\pi \epsilon_{0}r^{2}} , where r is the distance between their centres?

 

Answers (1)

The charge on the sphere is not exactly a point charge, we assume it when the distance between two bodies is large. when the two charged sphere is brought closer, the charge distribution on them will no longer remain uniform. Hence it is not true that electrostatic force between them exactly given by \frac{Q_{1}Q_{2}}{4\pi \epsilon_{0}r^{2}}

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