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Solve the all parts of given problem:

Problem: A long cylindrical copper wire of radius 0.20 cm is surrounded by a cylindrical sheath of rubber of inner radius 0.20 cm and outer radius 0.30 cm. The rubber has k=2.8. Suppose that the surface of the copper has a free charge density of 4.0 x 10-6 C/m2.

Part A: What will be the bound charge density on the inside surface of the rubber sheath?

Part B: What will be the electric field in the rubber near its inner surface?

Part C: What will be the electric field just outside the rubber sheath?

I need help to determine the electric field just outside the rubber sheath.

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