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Question: a beta particle moving at 19500 ms1 parallel to the...

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39.1 A particle moving at 19500 ms 1 parallel to the ground and due east through a region of space in which there is a uniform 0.05T magnetic field. If the magnetic field lines point u the vertical direction, what is the direction and magnitude of the magnetic force on the B+ 39.2 In a region of space there is a uniform magnetic field of mag- nitude 0.25 mT pointing vertically straight down. (a) If an electron is moving in the horizontal plane at a speed of 550 km s 1, what will the radius of the resultant circular path be? (b) Will the electron be moving clockwise or counter-clockwise when viewed from above? (c) If a positron (same mass as an electron but with a charge of +qe) is moving in the horizontal plane at speed of 550 km s 1, what will the radius of the resultant circular path be? (d) Will the positron be moving clockwise or counter-clockwise when viewed from above? (e) How fast would an a particle (da 2+ need to be traveling to have a path of the same radius as the electron in part (a)?
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