Ch 19 hw 2

# Ch 19 hw 2 - 1[MI02 19.E.16 2/2 points | 3/4 submissions Last Response | Show Details All Responses Notes(a Suppose you charge a 1.0 F capacitor

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1. [MI02 19.E.16.] 2/2 points | 3/4 submissions Last Response | Show Details All Responses Notes (a) Suppose you charge a 1.0 F capacitor with two 1.5 volt batteries. How much charge was on each plate? 3 3 C (b) How many excess electrons were on the negative plate? 1.875e19 1.88e+19 electrons 2. [MI02 19.E.17.] 2/2 points | 2/4 submissions Last Response | Show Details All Responses Notes (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 . In actual practice, it is usually easier to measure the conductivity and deduce the mobility u from this measurement. 8880000 8.88e+06 (b) What are the correct units for ? (_) (_) (A m)/V (o) (o) (A/m 2 )/(V/m) (_) (_) (A/m)/(V/m 2 ) (_) (_) (m/A)/(V/m 3 ) 3. [MI02 19.E.18.] 1/1 points | 1/4 submissions Last Response | Show Details All Responses Notes Consider a tungsten wire ( = 1.8 10 7 ) with a cross-sectional area of 1

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## This note was uploaded on 03/31/2008 for the course PY 208M taught by Professor Chabay during the Spring '08 term at N.C. State.

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Ch 19 hw 2 - 1[MI02 19.E.16 2/2 points | 3/4 submissions Last Response | Show Details All Responses Notes(a Suppose you charge a 1.0 F capacitor

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