You have two identical metal spheres and a negatively charged ebonite rod. Witho

Question

You have two identical metal spheres and a negatively charged ebonite rod. Without touching the rod to the spheres, which one of the following procedures can you use to give each sphere a net electrical charge of the same magnitude, one being positive and the other being negative?
a.) Touch the 2 spheres together. Bring the rod near one sphere, opposite the place where the spheres are touching. Then, remove the rod. Finally, separate the spheres. b.) Touch the 2 spheres together. Bring the rod near one sphere, opposite the place where the spheres are touching. Then, with the rod in place, separate the spheres. c.) Bring the 2 spheres near each other, but do not allow them to touch. Bring the rod into the space between the spheres. Then, with the rod in place, separate the spheres. d.) Bring the 2 spheres close together, but do not allow them to touch. Bring the rod near one sphere, opposite the space between the spheres. Then, with the rod in place, separate the spheres.

Explanation / Answer

b.) Touch the 2 spheres together. Bring the rod near one sphere, opposite the place where the spheres are touching. Then, with the rod in place, separate the spheres.

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