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(a) A conductor havingcavity C is chargedas shown in Fig. What is electricfied insidethe cavity ? Does the resultdependuponthe shape and size of the cavity ? (b)Can Gauss's law tell us exactly where teh charge is locatedinside the Gaussiansurface ? |
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Answer» Solution :(a) It is known that electric charges reside always on the surfacefo conductorsonly. Inside the conductors , charge is ZERO. The result is independent of the shapeand sizeof the cavity will always be zero irrespectivefo the size of the cavity. (b) Gauss's lawcannot determinethe position of charge. This is because, acccordingto Gauss's Law, electricflux overa Gaussian surface in vacumm is `1//in_(0)` TIMES the charge enclosedinsidethe surface . ThusGauss's law explains that the charge is insidethe CLOSED surface , and for EVERY positionof the charge inside TEH surface, the electricflux is the same. HenceGauss's Law. fails to specify the position of chargeinsidethe closed surface. |
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