A disk of radius a has a total charge Quniformly distributedover its surface. The disk has negligible thickness and liesin the xy plane. (Figure 1) Throughout this problem, youmay use the variable k in place of4π€0Figure1 of 1Part A147€0What is the electric potential V (z) on the axis as a function of z, for z>0?Express your answer in terms of Q, z, and a. You may use k instead of► View Available Hint(s)15. ΑΣΦV (²) = 2k€¸ Ã{√√2² + a² − 2)SubmitPrevious Answers Request AnswerX Incorrect; Try Again; 4 attempts remainingPart B?What is the magnitude E of the electric field on the z axis, as a function of z, for z> 0?47€0Express your answer in terms of some or all of the variables Q, z, and a. You may use k instead of► View Available Hint(s)

Answered: Image /qna-images/answer/12bd952d-5800-4248-918f-0699ef54b566.jpg

A disk of radius a has a total charge Quniformly distributed over its surface. The disk has negligible thickness and lies in the xy plane. (Figure 1) Throughout this problem, you may use the variable k in place of 4760 Figure 1 of 1 > Part A What is the electric potential V (z) on the z axis as a function of z, for z> 0? Express your answer in terms of Q, z, and a. You may use k instead of 470 ▸ View Available Hint(s) 1971 ΑΣΦ V (²) = |2k€¸ñ{√z² + a² − 2) Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part B ? What is the magnitude E of the electric field on the z axis, as a function of z, for z> 0? 4760 Express your answer in terms of some or all of the variables Q, z, and a. You may use k instead of ▸ View Available Hint(s)

A disk of radius a has a total charge Quniformly distributed over its surface. The disk has negligible thickness and lies in the xy plane. (Figure 1) Throughout this problem, you may use the variable k in place of 4760 Figure 1 of 1 > Part A What is the electric potential V (z) on the z axis as a function of z, for z> 0? Express your answer in terms of Q, z, and a. You may use k instead of 470 ▸ View Available Hint(s) 1971 ΑΣΦ V (²) = |2k€¸ñ{√z² + a² − 2) Submit Previous Answers Request Answer X Incorrect; Try Again; 4 attempts remaining Part B ? What is the magnitude E of the electric field on the z axis, as a function of z, for z> 0? 4760 Express your answer in terms of some or all of the variables Q, z, and a. You may use k instead of ▸ View Available Hint(s)

College Physics

11th Edition

ISBN:9781305952300

Author:Raymond A. Serway, Chris Vuille

Publisher:Raymond A. Serway, Chris Vuille

Chapter1: Units, Trigonometry. And Vectors

Section: Chapter Questions

Problem 1CQ: Estimate the order of magnitude of the length, in meters, of each of the following; (a) a mouse, (b)...

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This one is tougher! A sphere of radius r has charge q. (a) What is the infinitesimal increase in clectric potential energy dU if an infinitesimal amount of charge dq is brought to infinity to the surface of the sphere? (b) An uncharged sphere can acquire a total charge Q by the transfer of charge dq over and over and over. Use your answer to part a to find an cxpression for the potential energy of a uniformly-charged sphere of radius R with total charge Q. Answer: U = 3_1 Q² 5 4tc0 R' (c) Your answer to part b is the amount of energy nceded to assemble a charged sphere. It is often called the self-energy of the sphere. What is the self-energy of a proton, assuming it to be a charged sphere with a diamcter of 1.0 x 10 15 m?
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