if some one can do these two problems in physics II Special Problem 1 a) Conduct
ID: 1661012 • Letter: I
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if some one can do these two problems in physics II
Special Problem 1 a) Conducting rod A, with positive charge, is brought near an isolated conducting sphere B, which has no net charge. Rod A is brought into contact with sphere B and then moved slightly away from sphere B i) Prior to contact, is the force between A and B attractive, zero or repulsive? Illustrate the charge distributions on A and B. ii After contact, is the force between A and B attractive, zero or repulsive? Illustrate the charge distributions on A and B. b) Identical negatively charged identical plastic rods are brought near two neutral isolated spheres of identical radius. Sphere A is a conductor. Sphere B is an insulator. [The spheres are not near each other.] i) Which of the spheres experience a force, if either? Illustrate the charge distributions for each rod/sphere combination. If both spheres experience a force, which one experiences the greater force? li)Explanation / Answer
(a)(i)Prior to the contact, the force between A and B is zero.
This is because as stated by the question, B has no charge over it. So the force between them is zero.
ii)After contact, the force is repulsive, since becayuse of conduction, now the sphere has also attained some positive charge. The rod and the speher both has positive charge and we know that the like charges repels each other.
(b)(a)Speher A will experience an attractive force since it has got charged induced over its surface. The plastic rod has negative charge and sphere A being a conductir gets negative charge induced on its surface and hence it will experience an attractive force.
B required rubbing for getting charged as its an insulator.
(b) A has greater force and B has no force acting over it.
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