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openvellum.ecollege.com 0 Course Home I Chegg.com Amazon.com: Prime Video: Prime Video (17) YouTube PHYS 212 - Fall 2018- PSU University Park Garcia | Course Home Mastering Physics HW03: Electric Flux, Gauss, Law, and Conductors Problem 24.28 8 of 11> Eberly College of Science 3 My Courses A thin, horizontal, 17-cm-diameter copper plate is charged to -2.8 nC. Assume that the electrons are uniformly distributed on the surface Course Home Syllabus Assignments Scores Course Tools eText Study Area User Settings PartA What is the strength of the electric field 0.1 mm above the center of the top surface of the plate? Express your answer to two significant figures and include the appropriate units. 1.2.10 Submit Incorrect: Try Again; 4 attempts remaining Part B What is the direction of the electric field 0.1 mm above the center of the top surface of the plate? away from the plate toward the plate · Previous Ans Correct

Explanation / Answer

charge density is p= charge/area= -2.8*10^-9 / 3.14*0.085^2

and e= 8.85*10^-12 , radius of disc = 0.085m = 85mm

so, field at the given point is E = p/2e * ( 1 - (0.1/(0.1^2+85^2)^1/2) )

so, E = -1.4*10^4 N/C

ask if unclear, upvote if understood to appreciate

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