841_Physics ProblemsTechnical Physics

841_Physics ProblemsTechnical Physics - Chapter 29 P29.66...

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Chapter 29 181 P29.66 Let v x and v be the components of the velocity of the positron parallel to and perpendicular to the direction of the magnetic field. (a) The pitch of trajectory is the distance moved along x by the positron during each period, T (see Equation 29.15) pvT v m Bq p x == ° F H G I K J = ×° × × cos . .c o s .. . 85 0 2 500 10 850 2 911 10 0150160 10 104 10 63 1 19 4 af ej a f π m FIG. P29.66 (b) From Equation 29.13, r mv Bq mv Bq ° sin . 85 0 r = ×× ° × 9 11 10 5 00 10 85 0 0150 160 10 189 10 31 6 19 4 s i n . . e j m P29.67 τ = IAB where the effective current due to the orbiting electrons is I q t q T and the period of the motion is T R v = 2 . The electron’s speed in its orbit is found by requiring kq R mv R e 2 2 2 = or vq k mR e = . Substituting this expression for
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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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