practice-Exam2solutions - Physics321-Electrodynamics Autumn...

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Physics 321-Electrodynamics Autumn 2014 Printed Name ?L)T\ o Ns vL3 Exam 2 November 6, 2014 last first I certiry that the work I sbrll submit is my ortncrertioD, not copied from atry sourc , and thrt I shrll abide by the ersmioetion procedur s outlitred below Signature Student ID Number READ THIS ENTIRE PAGE NOW, BEFORE THE STARTING BELL. Do !9! open the eram before the starting bclt. You will have80 mitrutes after the bell to compl te the etamination. Eram papers rdill no lorger be accepted rfter 85 mirutes have elapsed. NO CELL PHONES, TEXT MSG, etc. ALLOWED AT ANY TIME Before the exrm begins: . Print and sign your name, and rmite your student ID number in the spaces on this page (above). Duriog thc eraD: lmportrnt! When the exam begins, print your name and srudent ID mrmber al the top ofeach and every page. Do this firlt when you aretold to open your ex.rm. Ifyou areconfirsed about a question, raise your hand and ask for an explanation- Ifyou cannot do one pafi ofa problem, move on to the next part. This is a closed book examination. You may not use your own notes. You may use a calculator, but not a computer o! other programmable device. For all problems: lfyou need more space than is available to answer any partofa problem, use the back side ofthe same psge to complete your answer. Clearly indicate to the grader that you used the back side. Scratch paper will be ignored. Show your work in enough detail so tharthe grader can follow your reasoning and your method of solution.Circle your answers, and state units if appropriate. For numerical answers significant figures should matchthe number ofsignificant figures in the numerical values givcn in the problem (usually 2 or 3). You will lose 3 poins on each problcm for whichyou donl put your name and sodent number at the top ofthe problem page. You lose 3 points for not filling out information at the top ofthis pag .
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VECTOR DERII'ATTVES Cr.t!d.D .,tl = d.ti + dl i + y': i: dr=dthdz crdicnt: vr:fri+fri"frr Di,cqcacc:o.t=f*f*f, Cvr,: o ^'= (*-*)'.(*-i"'.) t-(*-*)' - alr a:r ?tr ,aplaciant Vr.= 6F + e; + 5l Spbcrlcel rrl = dr i + r de i + t litn| dQ i', dt = tr sin 0 dr d0 dQ cmdi.n,i o,=lt*i#r--}-u.hi D'^v$cac. I v -, = jlrrtu'r + -Llr"t, t, * '! S cr.t. v ' '= -l= [$o"r,., - ]]t .' l [** - *'"'}]'* I [,1u*'- S]; t-ad*io,,,o.,= jr,1(',.1)*t,**(*r#)*zL*,r# CtH*il dl=dta+sd,a+r':i _y'7 = sdtd(tt: Grdicat.
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