midterm5

# midterm5 - PHYS 152 MIDTERM 5 (Summer 20II) Mo-Tu-W-Th...

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20II) Mo-Tu-W-Th 12:00-13:55 pm (Dr. Papp) Student # Name I. (10 pts) In the figure below a very small circular metal ring of radius r and resistance x is at the center of a large concentric circular metal ring of radius R (r<<R/. The two ring lie in the same plane. At a certain time tt thelarge ring carries a current 1r in clockwise direction. A little bit later, at time tz, rt carrtes an Iz currett in counterclockwise direction. a) What is the magnitude of the emf inthe small ring during this time? b) What is the magnitude and the direction of the average current in the small ring? c) What is the average electric field (magnitude and direction) in the small ring? V= fo qtrr l {a* - ti I {t ri. t "1 I t I {f,*+" l-\ tt< \t\ ] /vt t V1- lf ' {.t ll r{l {-e [e,"^t{ (- t i-l. {.{ ll lt I 1 c.r- \ ll ,N,, 'r rl T: I ,1.1.;"'t "l .'.'-'-.-.'-",.""-*"' \r i I I t ^.r^,-. .-/* !*-- i'ii*r IT t'? t\

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## This note was uploaded on 09/07/2011 for the course PHYS 100B taught by Professor Chuang during the Spring '08 term at CSU Long Beach.

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midterm5 - PHYS 152 MIDTERM 5 (Summer 20II) Mo-Tu-W-Th...

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