30 Gauss’s LawQ24.8Consider any point, zone, or object where electric field lines begin. Surround it with a close-fittinggaussian surface. The lines will go outward through the surface to constitute positive net flux. ThenGauss’s law asserts that positive net charge must be inside the surface: it is where the lines begin.Similarly, any place where electric field lines end must be just inside a gaussian surface passing netnegative flux, and must be a negative charge.Q24.9Inject some charge at arbitrary places within a conducting object. Every bit of the charge repelsevery other bit, so each bit runs away as far as it can, stopping only when it reaches the outer surfaceof the conductor.Q24.10If the person is uncharged, the electric field inside the sphere is zero. The interior wall of the shellcarries no charge. The person is not harmed by touching this wall. If the person carries a (small)charge q, the electric field inside the sphere is no longer zero. Charge –qis induced on the inner wallof the sphere. The person will get a (small) shock when touching the sphere, as all the charge on his
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .