P24_024 - q , and on the outer surface, charge + q (where q...

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24. (a) In Eq. 24-12, λ = q/L where q is the net charge enclosed by a cylindrical Gaussian surface of radius r . The Feld is being measured outside the system (the charged rod coaxial with the neutral cylinder) so that the net enclosed charge is only that which is on the rod. Consequently, | ~ E | = λ 2 πε 0 r = 2 . 0 × 10 9 2 πε 0 (0 . 15) = 240 N / C . (b) and (c) Since the Feld is zero inside the conductor (in an electrostatic conFguration), then there resides on the inner surface charge
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Unformatted text preview: q , and on the outer surface, charge + q (where q is the charge on the rod at the center). Therefore, with r i = 0 . 05 m, the surface density of charge is inner = q 2 r i L = 2 r i = 6 . 4 10 9 C / m 2 for the inner surface. And, with r o = 0 . 10 m, the surface charge density of the outer surface is outer = + q 2 r o L = 2 r o = +3 . 2 10 9 C / m 2 ....
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This note was uploaded on 11/12/2011 for the course PHYS 2001 taught by Professor Sprunger during the Fall '08 term at LSU.

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