Chapter 29177P29.53(a)Define vector hto have the downward direction of the current,and vector Lto be along the pipe into the page as shown. Theelectric current experiences a magnetic force .IhB×afin the direction of L.(b)The sodium, consisting of ions and electrons, flows along thepipe transporting no net charge. But inside the section oflength L,electrons drift upward to constitute downwardelectric current JJ×=areaLw.The current then feels a magnetic force IJLwhB°sin90 .FIG. P29.53This force along the pipe axis will make the fluid move, exerting pressureFJLwhBhwJLBarea==.P29.54Fy∑=0:+−=nmg0Fx∑=−+°=µknIBsin.90 00BmgIdk=0 100 0 2009 8010 00 50039 2....kgm sA mmT2bgejafafP29.55The magnetic force on each proton, FvBBqqvB=×=°sin90downwardperpendicular to velocity, causes centripetal acceleration, guiding it into a
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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 .