Two uncharged metal spheres, #1 and #2, are mounted on insulating support rods. A third metal sphere, carrying a positive charge, is then placed near #2. Now a copper wire is momentarily connected between $\# 1$ and #2 and then removed. Finally, sphere $\# 3$ is removed. In this final state

Question

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When the positive charge is brought near sphere #2, electrons in #2 are repelled to sphere #1, leaving #2 with a net positive charge. When the wire is connected, electrons flow from #1 to #2 until they have the same potential. When the wire is removed, #1 has a net positive charge and #2 has a net negative charge.

Two Uncharged Metal Spheres, #1 and #2, Are Mounted on Insulating