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WHomework set 8_solns_2011

WHomework set 8_solns_2011 - Homework set 8 Problems 19.2 4...

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Homework set # 8 Problems: 19.2, 4, 11, 18, 19, 25, 30, 38 Solutions: 19.2 (a) For a positively charged particle, the direction of the force is that predicted by the right hand rule. These are: (a’) in plane of page and to left (b’) into the page (c’) out of the page (d’) in plane of page and toward the top (e’) into the page (f’) out of the page (b) For a negatively charged particle, the direction of the force is exactly opposite what the right hand rule predicts for positive charges. Thus, the answers for part (b) are reversed from those given in part (a) . 19.4 Hold the right hand with the fingers in the direction of v so that as you close your hand, the fingers move toward the direction of B . The thumb will point in the direction of the force (and hence the deflection) if the particle has a positive charge. The results are (a) toward top of page (b) out of the page , since the charge is negative. (c) zero force (d) into the page 19.11 From sin F BI L , the magnetic field is 3 0.12 N m 8.0 10 T sin 15 A sin90 F L B I
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