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A capacitor is made from two hollow, coaxial, iron cylinders, one inside the other. The inner...

A capacitor is made from two hollow, coaxial, iron cylinders, one inside the other. The inner cylinder is negatively charged and the outer is positively charged; the magnitude of the charge on each is 16.5 pC . The inner cylinder has a radius of 0.650 mm , the outer one has a radius of 4.00 mm , and the length of each cylinder is 20.0 cm .

(A) What is the capacitance?

Use 8.854×10−12 F/m for the permittivity of free space.

(B) What applied potential difference is necessary to produce these charges on the cylinders?

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