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A small sphere of radius r_1 and charge q_1 is enclosed by a spherical shell of radius r_2 and charge q_2. Show that if q_1 is positive, charge will necessarily 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 :The potential inside the SHELL is constant and is equal to that on its surface. The potential DIFFERENCE then DEPENDS only on `q_1`. Potential is highest on A. Hence charge flows from A to E irrespective of the value of `q_2`. | |