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A small sphere of radius r_1 and charge q_1 is enclosed by a spherical shell of radium r_2 and charge q_2. Show that if q_1 is positive , charge will neecessarily flow from the sphere to the shell ( when the two are connected by a wire ) no matter what the charge q_2 on the shell is . |
| Answer» Solution :Hint: By Gauss’s law, field between the SPHERE and the SHELL is determined by `q_(1)` alone. Hence, potential DIFFERENCE between the sphere and the shell is independent of `q_(2)`. If `q_(1)`is positive, this potential difference is always positive. | |