768_Physics ProblemsTechnical Physics

768_Physics ProblemsTechnical Physics - 108 P27.3 Current...

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108 Current and Resistance P27.3 Qt Id t I e t t af ej == z 0 0 1 τ (a) QI e I ττ =− = 0 1 0 10 6 3 2 . (b) e I 10 1 0 999 95 0 10 0 bg =−= . (c) e I ∞= = −∞ 00 1 P27.4 (a) Using ke r mv r e 2 2 2 = , we get: v mr e × 2 6 219 10 . m s . (b) The time for the electron to revolve around the proton once is: t r v × × 2 2 5 29 10 152 10 11 6 16 π . . . m ms s . The total charge flow in this time is 160 10 19 . × C , so the current is I = × × = 160 10 105 10 105 19 16 3 . .. C 1.52 10 s A m A . P27.5 The period of revolution for the sphere is T = 2 ω , and the average current represented by this revolving charge is I q T q 2 . P27.6 qt t =+ + 45 6 3 A = F H G I K J 200 100 200 10 2 4 . .
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This note was uploaded on 12/14/2011 for the course PHY 203 taught by Professor Staff during the Fall '11 term at Indiana State University .

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