2. Describe what happens when a plastic sheet brought near the metal disk of the electroscope is positively charged. Draw a diagram to show how the electrons move in this case. 3. Describe the steps to be followed to charge two metal spheres by induction. Draw diagrams to show what happens. 4. The force of attraction between two identical charges is Fg when they are separated by a distance r. What will happen to the magnitude of the force if r is doubled? if r is halved? 5. Three spheres labeled A, B, and C are each suspended by an insulating thread. One of them is positively charged, another is negatively charged, and the other one is uncharged. A fourth sphere made of polythene is rubbed with a cloth and brought near (but not touching) each suspended sphere in turn. The following effects are observed:

2. Describe what happens when a plastic sheet brought near the metal disk of the electroscope is positively charged. Draw a diagram to show how the electrons move in this case. 3. Describe the steps to be followed to charge two metal spheres by induction. Draw diagrams to show what happens. 4. The force of attraction between two identical charges is Fg when they are separated by a distance r. What will happen to the magnitude of the force if r is doubled? if r is halved? 5. Three spheres labeled A, B, and C are each suspended by an insulating thread. One of them is positively charged, another is negatively charged, and the other one is uncharged. A fourth sphere made of polythene is rubbed with a cloth and brought near (but not touching) each suspended sphere in turn. The following effects are observed:

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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Question

100%

2. Describe what happens when a plastic sheet brought near the metal disk of the
electroscope is positively charged. Draw a diagram to show how the electrons move in
this case.
3. Describe the steps to be followed to charge two metal spheres by induction.
Draw diagrams to show what happens.
4. The force of attraction between two identical charges is Fg when they are separated by a
distance r. What will happen to the magnitude of the force if r is doubled? if r is halved?
5. Three spheres labeled A, B, and C are each suspended by an insulating thread. One of
them is positively charged, another is negatively charged, and the other one is uncharged.
A fourth sphere made of polythene is rubbed with a cloth and brought near (but not
touching) each suspended sphere in turn. The following effects are observed:
Sphere A = attraction
%3D
Sphere B= repulsion
Sphere C= attraction
From the given observation, what is the nature of each of these spheres? What can you
do to identify specifically the charge on each suspended sphere?
6. What is the force on an electron in an electric field of 500 N/C?
kQ
7. Derive the unit of Ep using the equation E,
%3D
8. One thousand electrons are removed from a neutral pith ball. Find the magnitude of the
charge.

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