b d A small conducting spherical shell with inner radius a and outer radius b is concentric with a larger conducting spherical shell with inner radius c and outer radius d. The inner shell has total charge +2q, and the outer shell has charge +4q. 1. What is the charge on: The inner surface of the inner shell The middle of the inner shell The outer surface of the inner shell The inner surface of the outer shell The outer surface of the outer shell
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