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Unformatted text preview: where an a particle (charge of +2 e ) would feel no force due to this arrangement of charged objects. There are two possible points, above the line and below the plane. Between the line and plane is not possible 22.44 A conducting spherical shell with inner radius a and outer radius b has a positive point charge Q at its center. The total charge on the shell is -3 Q , and it is insulated from its surroundings. Find E ( r ) for (A) r < a , (B) a < r < b and (C) r > b . Find (D) on the inner surface at a and (E) on the outer surface at b . Flux out of a Cube A point charge of magnitude Q is at the center of a cube with sides of length L . (A) What is the electric flux through each of the six faces of the cube? (B) What if L changes? (A) NB : This problem involves an insulator, which can have a uniform volume charge density. Compare problem 22.44, which involves a conductor, inside of which E = 0. d A 70 o NB: The angle between d A and E is 70 o . E...
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- Spring '08