317 (F96) Exam #2

# 317 (F96) Exam #2 - Physics 317(Fall 1996 Second Exam Name...

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Physics 317 (Fall 1996) Second Exam (October 11, 1996) Name 1. A. An infinite insulating line of charge of uniform charge density extends horizontally as shown. An imaginary rectangular Gaussian surface whose cross-section is a square with sides of length s and which has a length L o is centered on the line of charge. It is known that the flux through the Gaussian surface is Φ o . i. [6 pts] Find the charge density of the line of charge in terms of the given variables. ii. [5 pts] What is the electric flux through the bottom side of the Gaussian surface? Explain your reasoning. B. Two parallel infinite nonconducting sheets of charge, each with uniform charge density - σ o are now brought close to the line of charge as shown. The top and bottom of the Gaussian surface are parallel to the sheets. The line of charge is closer to the bottom sheet of charge than it is to the top sheet. i. [8 pts] Is the flux through the bottom side of the Gaussian surface greater than, less than, or equal to the flux

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