{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}

Physics 1 Problem Solutions 207

Physics 1 Problem Solutions 207 - Chapt 26 Capacitors and...

Info icon This preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
Chapt. 26 Capacitors and Capacitance 203 026 qfull 01000 1 3 0 easy math: classical electron radius Extra keywords: Uses electric field energy, and so is capacitor lecture problem. 4. People once tried to devise a semi-classical model of an electron in which the rest mass energy given by the Einstein equation E = mc 2 ( E for energy here) was entirely stored as electric field energy. Remember this energy can be easily calculated from the potential energy of the assembled charge distribution provided you don’t have to calculate the potential energy of a point charge. a) What they did was assume that all the electron charge was uniformly spread on the surface of a sphere of radius R . (Note this distribution avoids any point charges). What is the potential energy of a sphere of radius R with uniform surface density Q ? b) What formula and value for R did those long-ago folks arrive at from their model? c) As a matter of fact, the proton has a measurable radius of about 0 . 9 × 10 15 m: this is the radius of the sphere over which charge seems to be spread: i.e., the charge radius. Given
Image of page 1
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern