117-11HMWRK2 - Prof E Yablonovitch Homework#2 ELECTROMAGNETIC FIELDS AND WAVES EE117 assigned Feb 7 2011 Due 5PM Monday Feb 14 2011 Please put the

117-11HMWRK2 - Prof E Yablonovitch Homework#2...

This preview shows page 1 out of 1 page.

Prof. E. Yablonovitch ELECTROMAGNETIC FIELDS AND WAVES EE117 Homework #2; assigned: Feb. 7, 2011 Due 5PM, Monday, Feb. 14, 2011 Please put the completed homework in the plastic tray on my door, 267M Cory 1. An infinitely long conducting cylinder of radius a , has a surface charge density of ρ s . The cylinder is surrounded by a dielectric medium with ε r =4 and contains no free charges. To induce charges on the metal surface, an external electric field must be applied. The tangential component of the electric field in the region r>a caused by the surface charges is 2 / cos ˆ r E t φ φ = where φ ˆ is a unit vector in the tangential direction. Since a static conductor cannot have any tangential field, this must be cancelled by the externally applied electric field.
Image of page 1

You've reached the end of your free preview.

Want to read the whole page?

Unformatted text preview: Find the surface charge density, ρ s . 2. Problem 4.58 on page 233 of Ulaby 6 th edition. 3. You have a 20cm × 30cm rectangular loop of wire carrying 10Amps dc. What is the magnetic field in the center of the loop? 4. Problem 5.4 on page 274 of Ulaby 6 th edition. 5. Do Problem 5.17 on page 277 of Ulaby 6 th edition. 6. You are making electrical contact using the very large hemispherical electrode below. Contact is made to a tiny hemispherical protrusion of diameter 100nm shown in red below. What is the contact resistance of this electrode? Please take the Ag, Silver, resistivity as 2 × 10-8 Ohm-meters. ∞ 100nm Ag...
View Full Document

  • Fall '09
  • Electromagnet, Electric charge, Fundamental physics concepts, surface charge density, Ulaby, Ulaby 6th edition

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

Stuck? We have tutors online 24/7 who can help you get unstuck.
A+ icon
Ask Expert Tutors You can ask You can ask You can ask (will expire )
Answers in as fast as 15 minutes
A+ icon
Ask Expert Tutors