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Unformatted text preview: Solution for Lab Quiz 7 Parallel Plane Checkup Solution to Lab Quiz Problem 7.1(Compute Electric Field for Parallel Planes of Fixed Charge) Problem: An infinite plane of charge with uniform charge density 1 = 1 C/m 2 occupies the y- z plane through the origin. A parallel plane through x = 1cm has charge density 2 =- 1 / 2 . Compute the electric field in the region between the planes. Select One of the Following: (a) 3 1 2 x (b) 1 4 x (c-Answer) 3 1 4 x (d)- 1 4 x (e) - 3 1 4 x Solution Section 1 - Draw the System 1 (a) Draw a Good Diagram: This will yield a diagram with charge labeled and divided into re- gions. + + + + + +--- a b Gaussian Surface E I E II E III Q 1 Q 2 I II III Section 2 - Compute the Field in the Outer Re- gions Compute the electric field in regions I and III, the outermost regions. (a) Use a Gaussian Surface Enclosing all Charge: Use a surface, labeled a, with the left end in region I and the right end in region III , our general expression for Gauss Law for planes becomes:- E I + E III = Q total A ....
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This note was uploaded on 03/29/2010 for the course PHYS 2469 taught by Professor Stewat during the Spring '10 term at University of Arkansas Community College at Batesville.
- Spring '10