PHYS 2114 Exam 2 Fall 2011

PHYS 2114 Exam 2 Fall 2011 - Midterm Exam 2 Physics 2114...

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Physics 2114 Midterm Exam 2 Fall 2011 (36) "2- .J- j k (out of page) L + Figure la .., ,".~., Signat, ::li' 7 Problem I (See Figs. I) Use given coordinate system. Answer questions a-f. R 1 ~ if} In Fig. la switch S is closed and charging of an initially uncharged capacitor begins. Answer questions a-d. a. Calculate the time constant associated with charging the capacitor. r;"' R c..-:. . (z. \:) J1. .,)(/ D I'" I 0 - (, r) -;. L Z ~ /0-'1 5'V ;1'0 r {,. .e S- K i~t.edh I):() 0'.0 b. Calculate the initial current 1 0 , J~~~) To ~~ = '!o:U -=!].,c,A1 Co Calculate the capacitor voltage after a time 3RC. \}c. ~ 12 (/- e.-~) :; C'-:~_/-._-~ d. When the capacitor is fully charged lind the current. capacitor voltage and charge, and resistor voltage.~_) I z. . "'" /ufl'J ~'1J1. .d '1It~1 I Q -= (V -:. /0 ;)-O:-r;;;\(I7. . V) T ~ ~ -0- 12 -;./~ )__ Q~ It ?-I'/O-'-I. _ ) .- 'lQ.Sl. .• ~.-! . v. :0 5fr- ~ ....,. ....e.,. ..,_ ;r """'J ~. ....,. ...I- r4<>l'} _ (~7 'R. See Fig. Ib to answer q~estions e _g 0 Ii 0- t t2 "-7 (0'0 AX z. ..o J2,) ~ V:;. . J":Y 0 Co.t""~ ; S,~.,. . ~ e. The direction oftheB -field at point P due to current I as indicated in Fig. Ib is into. ~t of, araIlel to the pate ~ ~~1 which corresponds to [i , - i, j, - j m- k] as governed by the assigned coordinate /stem. Circle One
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PHYS 2114 Exam 2 Fall 2011 - Midterm Exam 2 Physics 2114...

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