Ncert Exercises & Solutions

A small sphere of radius \(r_1\) and positive charge \(q_1\) is enclosed by a spherical shell of radius \(r_2\) and charge \(q_2. \) When the sphere and the shell are connected by a wire, in which direction will charge necessarily flow?
1. From the shell to the sphere
2. From the sphere to the shell
3. No charge will flow
4. The direction of charge flow depends on the magnitude and sign of \(q_2\)

According to Gauss's law, the electric field between a sphere and a shell is determined by the charge q₁ on a small sphere. Hence, the potential difference, V, between the sphere and the shell is indepenotentialdent of charge q₂. For positive charge q₁, p difference V is always positive.

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