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Two coaxial conducting cylindrical shells have equal and opposite charges. The inner shell has charge −q...

Two coaxial conducting cylindrical shells have equal and opposite charges. The inner shell has charge −q and an inner radius a, and the outer shell has charge +q and an outer radius b. The length of each cylindrical shell is L, and L is very long compared with b. Find the potential difference, Va – Vb between the shells

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