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A cylindrical capacitor consists of a solid inner conducting core with radius 0.270 cmcm , surrounded...

A cylindrical capacitor consists of a solid inner conducting core with radius 0.270 cmcm , surrounded by an outer hollow conducting tube. The two conductors are separated by air, and the length of the cylinder is 14.5 cmcm . The capacitance is 39.0 pFpF .

a-Calculate the outer radius of the hollow tube.

b-When the capacitor is charged to 120 V , what is the charge per unit length λ on the capacitor?

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