Physics, 04.04.2020 17:51 arthurcasella
Two pith balls hang side by side close to each other without touching as shown in the figure below. They are both neutral to begin with.
a. A plastic rod is rubbed with wool. Describe as negative, positive or neutral the total (net) charge of a system consisting of the rod and the cloth. Explain your reasoning.
b. A student touches sphere A briefly with the rod and then removes it. Then he brings the rod close to sphere A but does not touch it. What will happen to A? Explain your reasoning.
c. What is the charge state of the system consisting of the rod and wool now? Explain your reasoning.
d. Now sphere B is brought very close to A but does not touch it. What will happen to the spheres? Explain your reasoning.
e. Now the student touches sphere B with the same charged rod as above. What will happen to spheres A and B afterwards? Again, the spheres are close to each other but do not touch. Explain your reasoning.
f. What is the charge state of the system consisting of the rod and both spheres? Explain your reasoning.
g. Sphere B is now discharged. Then it is touched by a glass rod that was rubbed with silk. Now both spheres are brought close to each other. What will happen to the spheres now? Explain your reasoning.
h. Both spheres are now moved a bit further apart. What will happen to them now? Explain your reasoning.
Answers: 1
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Two pith balls hang side by side close to each other without touching as shown in the figure below....
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