A commercially available capacitor: 2.7 volts, 3000 Farads. Making "ultracapacitors" like this requires going beyond just a simple old-fashioned "thin film dielectric"... (Using the formula C = epsilon0 A/d, even with d=1 nm, you'd need an effective plate area of almost 1 km*1 km, all rolled up to fit into that little battery-sized container!)

Week 9 - March 9-13:

• CHECK OUT THESE LINKS for simulations to show vector fields in 2D and 3D and another (emstatic) in 2D.
  
  
• MIDTERM EXAM 2 is next week, Tues night march 17, 7:15-9:15pm in the Physics Helproom, Duane G1B90. The exam will cover up to and including the Linear Dielectrics (Griffiths' 4.4). You will have access to your purple sheet and some formulas on the exam cover sheet (posted later this week). Old exam 2 questions are posted on CULearn. Note in one of the exams, there are questions on magnetic fields because the exam was given later in the semester. Our exam will not include questions on magnetic fields.
  
  
• OFFICE HOURS THIS WEEK: Monday office hours with Prof. Kinney will be in the tutorial bay, G2B77, from 3-4pm and 5-6pm. Tuesday office hours are in the same location and run from 4-6:00pm. If you cannot come to one of these sessions, send me an email, and I'll try to find another time.
  
  
• WRITTEN HOMEWORK: HW#8 is due this week on March 11th in class as usual. The problems can be found at the assignments link (always available on the sidebar).
  
  
• READING: We are finishing electric fields in matter, and starting static magnetic fields. Read Griffiths' 4.4 and 5.1.
  
  
• TUTORIALS: This week we have a "review" tutorial, Friday (Mar 13) at 4pm at the G2B tutorial bay G2B77. We'll review the major topics in preparation for the exam next week. All tutorials are posted on the assignments page.
  
  
• HW SOLUTIONS: Solutions to HW1 - HW7 are posted on our CULearn page.
  
  
• Course home pages from the previous week: 1, 2, 3, 4, 5, 6, 7, 8.