z31 - Physics 124 Spring 2012 Document#09 Homework#05 page...

This preview shows page 1 - 3 out of 17 pages.

Physics 124 Spring 2012 – Document #09: Homework #05 page 1 of 17 PHYS 124: Homework #05 Feb 13, 2012 Homework #05 is due in Box outside of Rock 207: 4:00 PM Sharp, TUESDAY February 21, 2012 Announcements: Note that this problem set is due Tuesday instead of Monday. Reminder: Mr. Covault’s Office Hours will generally be Mondays: 11 AM to noon and 1:30 PM to 4:00 PM, Thursdays: 1:15 PM to 2:30 PM and 3 PM to 4 PM, and Fridays: 10:45 AM to 12:15 PM. If you plan to be at office hours send an email to let me know when you will arrive and then I can be sure to expect you. Second Hour Exam (worth ten percent of your grade) will be given Friday, February 24, 9:30 AM in lecture. The exam is closed book, no books or notes – but you may bring two 8 1 2 × 11 sheet of paper (front and back) with any hand-written notes that you like. Simple calculators are okay – no programmable calculators, PDA’s, phones, Blackberries, etc. Reading assignment: Read Physics for Scientists and Engineers Third Edition, Volume 2 by Ohanian and Markert as follows: Read Chapter 26 as follows: – Read Section 26.1 . You need to know what a capacitor actually is. The example of an isolated sphere is not very practical. The example of the two plates is much more characteristic. – Read Section 26.2 . These rules look like resistor rules but (surprisingly!) they go the other way: Capacitors in parallel add, capacitors in series “divide”. Be sure you can explain why this is true. – Skip Section 26.3 . We will do dielectrics in Cycle 3. Read Chapter 27 as follows: – Review sections 27.1, 27.2 and 27.4 . Skip Section 27.3 forever. Ohm does not really look like a happy guy on page 866, does he? Read Chapter 28 as follows: – Review Sections 28.1, and 28.2 . Please note that in class I will always use the term “Voltage” and I will never use the words “Electromotive Force” or “EMF” because this term gives the inaccurate impression that voltage is a kind of force.
Image of page 1

Subscribe to view the full document.

Physics 124 Spring 2012 – Document #09: Homework #05 page 2 of 17 – Read Carefully Sections 28.3 and 28.4 . You need to learn “KVL” and “KCL”. These are two “general rules” that we can use to tackle even complicated circuits. I just wish the textbook would use the term “voltage” instead of “EMF”. Together with specific rules for voltage sources, resistors, and capacitors, KVL and KCL allow you to deter- mine the voltage and current in almost any “steady state” circuit diagram. – Review Section 28.5 . Power is current times voltage for any component. – Skim Section 28.7 . We will only “take a peek” at RC circuits this cycle. The key issue is that there is a “time constant” τ = RC . – Read Section 28.8 . This information could save your life some day. Read Chapter 29 as follows: – Review Sections 29.1, 29.2 and also 29.5 . You need to know what Biot-Savart means, and how this is the magnetic analog to Coulomb’s Law.
Image of page 2
Image of page 3
  • Spring '12
  • warfield
  • Electric charge, Gauss’ Law

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