HW__11_P213_F08 - Physics 2213 Read: Homework #11 Chapter...

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1 Physics 2213 Homework #11 Fall 2008 Read: Chapter 27, sections 27.4-27.8 For study: Chap. 27: Q's #Q27.7, 10, 12, 13, 14, 15, 16, 18, 21 (not turned in) E's & P's: #27.15, 21, 27, 31, 33, 39, 57, 73, 75, 79 To be discussed in recitation sections the week of November 10-14, to be quizzed (together with HW 12) the week of November 17-21: #27.19 [Fusion Reactor] ` #27.22 [Cosmic Ray Experiment] #27.60 [TV Picture Tube] #27.72 [EM Rail Gun] #1. [Velocity Selector] A velocity selector uses crossed electric and magnetic fields to allow only charged particles with a specific speed to pass through without being deflected. (a) What should be the direction of the magnetic field in the diagram to allow a positive ion shown in the diagram to pass undeflected through the electric field region between the charged plates? Would the direction of the magnetic field be different if the ion were negative? (b) Suppose the magnetic field strength is 0.150 T, and the desired ion speed is 80 km/s. What voltage should be applied between the two deflecting plates if they are 2.5 cm apart? (c) Does this voltage
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HW__11_P213_F08 - Physics 2213 Read: Homework #11 Chapter...

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