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Unformatted text preview: Rodriguez, Brandon – Homework 4 – Due: Sep 5 2006, 11:00 am – Inst: Andrew J Rader 1 This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. Please notice that for your homework to be considered towards your grade, it needs to be submitted one hour before the corresponding recitation starts. Work submitted after this time, but before the DUE DATE on top of this page, will be accepted but not graded. PLEASE REMEMBER THAT YOU MUST CARRY OUT YOUR CALCULA- TIONS TO AT LEAST THREE SIGNIFI- CANT FIGURES. YOUR ANSWER MUST BE WITHIN ONE PERCENT OF THE CORRECT RESULT TO BE MARKED AS CORRECT BY THE SERVER. 001 (part 1 of 3) 4 points An electric field of magnitude 4750 N / C is applied along the x axis. Calculate the electric flux through a rect- angular plane 0 . 503 m wide and 0 . 9 m long if the plane is parallel to the yz plane. Correct answer: 2150 . 32 N · m 2 / C. Explanation: Let : E = 4750 N / C , θ = 0 ◦ , L = 0 . 9 m , and W = 0 . 503 m . The area of the rectangle is A = LW = (0 . 9 m)(0 . 503 m) = 0 . 4527 m 2 . Since the field is uniform,the flux is φ = E · A = E A cos θ = (4750 N / C)(0 . 4527 m 2 )(cos0 ◦ ) = 2150 . 32 N · m 2 / C . 002 (part 2 of 3) 4 points Calculate the electric flux through the same rectangle, if it is parallel to the xy plane. Correct answer: 0 N · m 2 / C. Explanation: The angle is θ = 90 ◦ ,cos θ = 0 , and φ = E · A = E A cos θ = (4750 N / C)(0 . 4527 m 2 )(0) = 0 N · m 2 / C ....
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This note was uploaded on 10/18/2010 for the course PHYSICS 251 taught by Professor Pedon during the Spring '08 term at IUPUI.
- Spring '08