CH 19 HW 2 F2008

# CH 19 HW 2 F2008 - CH 19 HW 2 F2008 11:40 PM WebAssign CH...

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10/30/08 11:40 PM CH 19 HW 2 F2008 Page 1 of 3 http://www.webassign.net/[email protected]/[email protected] CH 19 HW 2 F2008 (Homework) BAKER KRISTINE NICOLE PY 208M, section 004, Fall 2008 Instructor: Laura I. Clarke Web Assign Current Score: 13 out of 13 Due: Monday, October 20, 2008 12:30 PM EDT Description Macroscopic description of circuits: capacitance, conductivity, resistance, power. Instructions Reading: Sec 19.10-19.16 The due date for this assignment is past. Your work can be viewed below, but no changes can be made. 1. 2/2 points (a) Suppose you charge a 1.5 F capacitor with two 1.5 volt batteries. How much charge was on each plate? 4.5 4.5 C (b) How many excess electrons were on the negative plate? 2.8125e19 2.81e+19 electrons 2. 2/2 points (a) In tin at room temperature, the mobility of mobile electrons is about 1.5 10 -3 (m/s)/(V/m), and there are about 3.7 10 28 mobile electrons per m 3 . Calculate the conductivity σ . In actual practice, it

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CH 19 HW 2 F2008 - CH 19 HW 2 F2008 11:40 PM WebAssign CH...

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