172 Magnetic FieldsP29.37EmveV==122∆andevBmvRsin902°=BmveRmeReVmRmVeB==××××=×−−−2121580 102 1 67 1010 0 10160 10788 10102761912∆∆.....mkgVCTejej*P29.38(a)At the moment shown in Figure 29.21, the particle must bemoving upward in order for the magnetic force on it to beinto the page, toward the center of this turn of itsspiral path. Throughout its motion it circulates clockwise.vB+FIG. P29.38(a)(b)After the particle has passed the middle of the bottle andmoves into the region of increasing magnetic field, themagnetic force on it has a component to the left (as well asa radially inward component) as shown. This force in the–xdirection slows and reverses the particle’s motion alongthe axis.FBvFIG. P29.38(b)(c)The magnetic force is perpendicular to the velocity and does no work on the particle. The
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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 .