P25_035 - 35(a According to the result of problem 28 the...

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35. (a) According to the result of problem 28, the electric potential at a point with coordinate x is given by V = Q 4 πε 0 L ln µ x L x . We diFerentiate the potential with respect to x to ±nd the x component of the electric ±eld: E x = ∂V ∂x = Q 4 πε 0 L ∂x ln µ x L x = Q 4 πε 0 L x x L µ 1 x x L x 2 = Q 4 πε 0 x ( x L ) . At x = d we obtain E x = Q 4 πε 0 d ( d + L ) . (b) Consider two points an equal in±nitesimal distance on either side of P 1 , along a line that is per- pendicular to the
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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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