Charge and Electric Field of a Hollow Conductor (D27) [5B20.10]
A conducting sphere is charged with a Wimshurst Machine. Charge is removed from the outside of the sphere and placed on an electroscope, which deflects outwards. When the procedure is done for the inside of the sphere, it is found that no charge resides there. Conducting balls are used to examine the effect of the sphere's electric field on the displacement of charge. The field induces opposite charges on the balls and, again, the effect is shown using the electroscope.
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