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Unformatted text preview: maldonado (om2892) Homework 3 2010 UPII Stone (13750) 1 This printout should have 31 questions. Multiplechoice questions may continue on the next column or page find all choices before answering. 001 10.0 points A uniformly charged insulating rod of length 16 . 3 cm is bent into the shape of a semicircle as in the figure. The value of the Coulomb constant is 8 . 98755 10 9 N m 2 / C 2 . 1 6 . 3 c m 6 . 62 C O If the rod has a total charge of 6 . 62 C, find the horizontal component of the electric field at O , the center of the semicircle. Define right as positive. Answer in units of N / C. 002 (part 1 of 5) 2.0 points Consider a cylindrical distribution [dark gray] extending from r = 0 to r = 9 . 7 cm, of charge = r a , where a = 30 cm m 3 / C. This cylindrical charge distribution [dark gray] is surrounded by a dielectric shell [light gray] whose inner radius is 17 cm and outer radius is 2 . 6 cm as shown in the figure. L 2 . 6 cm 17 cm 9 . 7 cm b What is the electric field at 3 . 66 cm? As sume the length L is very long compared to the diameter of the dielectric shell. Neglect edge effects. Answer in units of V / m. 003 (part 2 of 5) 2.0 points What is the electric field at 12 . 7 cm? Answer in units of V / m. 004 (part 3 of 5) 2.0 points What is the electric field at 20 . 9 cm? Answer in units of V / m. 005 (part 4 of 5) 2.0 points What is the electric field at 30 . 7 cm? Answer in units of V / m. 006 (part 5 of 5) 2.0 points What is the surface charge density on the inner surface of the dielectric? Answer in units of C / m 2 . 007 (part 1 of 4) 3.0 points A solid sphere of radius 51 cm has a total pos itive charge of 10 . 7 C uniformly distributed throughout its volume....
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 Summer '10
 Stone
 Charge, Work

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