6. The negative charge distribution over thesurface of two isolated spheres is d

Question

6. The negative charge distribution over thesurface of two isolated spheres is depicted in the diagram. One ofthe spheres is made of copper and the other is made of rubber.Identify the sphere that depicts the charge distribution of copperand that of rubber. Support the answer with anexplanation.

6. The negative charge distribution over thesurface of two isolated spheres is depicted in the diagram. One ofthe spheres is made of copper and the other is made of rubber.Identify the sphere that depicts the charge distribution of copperand that of rubber. Support the answer with anexplanation. Answer

Explanation / Answer

     The electric field inside a conductormust be 0, therefore the charges on a conducting sphere stay on thesurface of the sphere (think of them pushing each other as far awayas possible), therefore Sphere B must be the conducting coppersphere.      The charges in an insulator are notfree to move, therefore Sphere A must be the insulating rubbersphere.

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