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Unformatted text preview: Create assignment, 57112, Homework 4, Aug 31 at 7:09 pm 1 This print-out should have 23 questions. Multiple-choice questions may continue on the next column or page – find all choices before answering. The due time is Central time. Covers 22.4-22.5,23.1 Charged Cylindrical Shell 24:02, calculus, numeric, > 1 min, normal. 001 A cylindrical shell of radius 7 cm and length 240 cm has its charge density uniformly dis- tributed on its surface. The electric field intensity at a point 19 cm radially outward from its axis (measured from the midpoint of the shell ) is 36000 N / C. Given: k e = 8 . 99 × 10 9 N · m 2 / C 2 . What is the net charge on the shell? Answer in units of C. 002 What is the electric field at a point 4 cm from the axis? Answer in units of N / C. Nonuniformly Charged Sphere 24:03, calculus, numeric, > 1 min, normal. 003 Consider a solid insulating sphere of radius b with nonuniform charge density ρ = a r , where a is a constant. r dr O b Find the charge Q r contained within the radius r , when r < b as in the figure. Note: The volume element dV for a spherical shell of radius r and thickness dr is equal to 4 π r 2 dr .) 1. Q r = 0 2. Q r = π a r 3 3. Q r = π a r 2 4. Q r = a r 4 π 5. Q r = a r 3 π 6. Q r = a r 2 π 7. Q r = r 4 π a 8. Q r = r 3 π a 9. Q r = a π r 2 10. Q r = π a r 4 004 If a = 1 × 10- 6 C / m 4 and b = 1 m, find E at r = 0 . 5 m. Answer in units of N / C. 005 Find the charge Q b contained within the ra- dius r , when r > b . 1. Q b = π b 3 a 2. Q b = π a b 3 3. Q b = π a b 2 4. Q b = π a b 4 5. Q b = π a b 4 6. Q b = π b 2 a 7. Q b = a b 4 π 8. Q b = a b 3 π 9. Q b = a b 2 π 10. Q b = 0 Sphere Inside a Shell 01 24:07, trigonometry, multiple choice, > 1 min, Create assignment, 57112, Homework 4, Aug 31 at 7:09 pm 2 fixed....
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This note was uploaded on 11/12/2009 for the course PHY 303L taught by Professor Turner during the Spring '08 term at University of Texas.
- Spring '08