Problem: A capacitor is made from two hollow, coaxial copper cylinders, one inside the other. There is air in the space between the cylinders. The inner cylinder has net positive charge and the outer cylinder has net negative charge. The inner cylinder has radius 2.60mm, the outer cylinder has radius 3.10mm , and the length of each cylinder is 36.0 cm. If the potential difference between the surfaces of the two cylinders is 90.0V,
Part A: What is the magnitude of the electric field at a point between the two cylinders that is a distance of 2.90mm from their common axis and midway between the ends of the cylinders?
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