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842_Physics ProblemsTechnical Physics

842_Physics ProblemsTechnical Physics - 182 P29.69 Magnetic...

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182 Magnetic Fields P29.69 (a) K mv = = = × × 1 2 6 00 6 00 10 1 60 10 2 6 19 . . . MeV eV J eV e je j K v = × = × × = × 9 60 10 2 9 60 10 1 67 10 3 39 10 13 13 27 7 . . . . J J kg m s e j F qvB mv R B = = 2 so R mv qB = = × × × = 1 67 10 3 39 10 1 60 10 1 00 0 354 27 7 19 . . . . . kg m s C T m e je j e j a f x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x x 45.0° 45° 45° θ ' x v R B in T = 1 00 . FIG. P29.69 Then, from the diagram, x R = °= °= 2 45 0 2 0 354 45 0 0 501 sin . . sin . . m m a f (b) From the diagram, observe that ′ = ° θ 45 0 . . P29.70 (a) See graph to the right. The Hall voltage is directly proportional to the magnetic field. A least-square fit to the data gives the equation of the best fitting line as: V B H V T = × 1 00 10 4 . e j . (b) Comparing the equation of the line which fits the data
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