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Unformatted text preview: gonzales (pag757) – Homework 3 – Hoffmann – (56745) 1 This printout should have 11 questions. Multiplechoice questions may continue on the next column or page – find all choices before answering. 001 10.0 points In a particular region of the earth’s atmo sphere, the electric field above the earth’s sur face has been measured to be 151 N / C down ward at an altitude of 253 m and 174 . 5 N / C downward at an altitude of 419 m. The permittivity of free space is 8 . 85 × 10 − 12 C 2 / N · m 2 . Neglecting the curvature of the earth, cal culate the volume charge density of the at mosphere assuming it to be uniform between 253 m and 419 m. Answer in units of C / m 3 . 002 10.0 points A charge of 8 . 3 μ C is 20 cm above the center of a square of side length 40 cm. The permittivity of free space is 8 . 85 × 10 − 12 C 2 / N · m 2 . Find the flux through the square. Answer in units of N · m 2 / C....
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This note was uploaded on 01/27/2012 for the course PHY 303L taught by Professor Turner during the Spring '08 term at University of Texas.
 Spring '08
 Turner
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