Work out what would happen if a grounded pith ball came near the electroscope. Draw where the charges would be. Try this out, making sure the pith ball doesn’t touch the electroscope. Now work out what would happen if the pith ball touched the electroscope. Let the pith ball bounce against the electroscope, and then draw the charges to show why it acts differently (or should act differently) at this point.

Work out what would happen if a grounded pith ball came near the electroscope. Draw where the charges would be. Try this out, making sure the pith ball doesn’t touch the electroscope. Now work out what would happen if the pith ball touched the electroscope. Let the pith ball bounce against the electroscope, and then draw the charges to show why it acts differently (or should act differently) at this point.

College Physics

1st Edition

ISBN:9781938168000

Author:Paul Peter Urone, Roger Hinrichs

Publisher:Paul Peter Urone, Roger Hinrichs

Chapter18: Electric Charge And Electric Field

Section: Chapter Questions

Problem 53PE: A simple and common technique for accelerating electrons is shown in Figure 18.55, where there is a...

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A simple and common technique for accelerating electrons is shown in Figure 18.55, where there is a uniform electric field between two plates. Electrons are released, usually from a hot filament, near the negative plate, and there is a small hole in the positive plate that allows the electrons to continue moving. (a) Calculate the acceleration of the electorn if the field strength is 2.50104 N/C. (b) Explain why the electron will not be pulled back to the positive plate once it moves through the hole.
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