PHY212S12assign6

PHY212S12assign6 - How does one calculate the capacitance...

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PHY 212 (Spring 2012) PHY 212 Spring 2012 Assignment Sheet #6 Page 1 Assignment Sheet 6 Week VI: Feb. 19-25 Lecture Topics and Text Readings: 1. The properties of an electrical conductor in electrostatic equilibrium (30.4). 2. Capacitance and energy storage by capacitors (30.5, 30.6). 3. Electrical Currents (31.1, 31.2). 4. Electrical Current Density (31.3). 5. Resistivity and resistance (31.4, 31.5). We will skip section 30.7 on Dielectrics. Mastering Physics Assignment: MP Assignment 4 (Due at 9p on Saturday 25 Feb). Recitation Assignments: [Wed: 30-12(wb), 16(wb), 20(wb), 21(wb); 30-18(pe), 27(pe), 31(pe), 56(pe), 62(pe).] [Fri: 31-1 (1e); 31-4 (wb), 9(wb), 10(wb), 13(wb), 17(wb), 25(wb); 31-35(pe)] Study Questions and Related Homework Problems 1. What are the properties of an electrical conductor in electrostatic equilibrium? Do 30-12(wb). 2. What is the relationship between charge on a capacitor and potential difference between the capacitor’s plates? Do 30-16(wb), 30-27(pe). 3.
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Unformatted text preview: How does one calculate the capacitance for different conductor geometries? Do 30-18(pe), 30-56(pe). 4. How do capacitors in series and parallel add? Do 30-20(wb), 62(pe). 5. How does one calculate the energy of a capacitor? And where is a capacitors energy stored? Do 30-21(wb), 30-31(pe). 6. What is an electrical current? Do 31-1(1e), 4(wb). See below for the (1e) problem. 7. What is conservation of electrical current? Do 31-9(wb), 10(wb). 8. What is the distinction between an electrical current i' and an electrical current density j? Do 31-13(wb), 17(wb). 9. What does Ohms Law tell us about the relationship between electric potential difference and electrical current in normal conductors? Do 31-25(wb), 35 (pe). Problem 31-1(1e): 1.0 x 10 20 electrons flow through a cross section of a copper wire each second. The wire is 2.0 mm in diameter. (a) Calculate the electron drift-speed in the copper. (b) Calculate the electrical current through the wire....
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