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A conducting spherical shell of outer radius R and inner radius r = 3R/4 has no net charge on it. At its center there is a point charge q, and at a distance 2R from its center there is a point charge Q (Fig.) . (a) What is the magnitude of the electrostatic force on the charge q at the center due to the shell ? (b) What is the magnitude of net force on it? |
| Answer» Solution :(a) `(kqq)/(4R^(2))` towards RIGHT , (B) 0 | |