830_Physics ProblemsTechnical Physics

830_Physics ProblemsTechnical Physics - 170 Magnetic Fields...

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170 Magnetic Fields Section 29.4 Motion of a Charged Particle in a Uniform Magnetic Field P29.29 (a) B 50 0 10 6 . T ; v 620 10 6 m s Direction is given by the right-hand-rule: southward Fq v B F B B = × × ° −− sin .. . s i n . . θ 1 60 10 6 20 10 50 0 10 90 0 496 10 19 6 6 17 C m s T N ej e j e j (b) F mv r = 2 so r mv F == ×× × = 2 27 6 2 17 1 67 10 6 20 10 129 . . kg m s N km FIG. P29.29 P29.30 1 2 2 mv q V =∆ af 1 2 3 20 10 1 60 10 833 26 2 19 ×= × kg C V e j v v = 91 3 . kms The magnetic force provides the centripetal force: qvB mv r sin = 2 r mv qB = ° = ×⋅ = sin . . 90 0 3 20 10 9 13 10 160 10 0920 198 26 4 19 kg m s N s C m cm bg . P29.31 For each electron, qvB mv r sin . 90 0 2 °= and v eBr m = . The electrons have no internal structure to absorb energy, so the collision must be perfectly elastic:
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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 .

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