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We know that the gravitational field strength is zero insdie a spereical shell of matter. The electrical field strenght is zero not only insdie an isolated charged spherical conductor but inside an isolated cunductor of any shap . Is the gravitational field strength inside, say, a cubical shell of matter zer? if not, in what respect is the analogy not complete? |
| Answer» Solution :GRAVITATIONAL field strength inside a cubical shell of MATTER is not zero. Mass is CONSIDERED concentrated at the centre of a sphereical shell only and, not for other shapes, but there are free ELECTRONS in a conductor and they always arrange themselves so that net field inside it BECOMES zero at every point. | |