Physics 213 Homework #7 Spring 2008 Read: Chapter 27, all For practice: Chap. 27: Q's #Q27.1, 3, 4, 6, 7, 10-12, 14-16, 19-22 (not turned in) E's & P's: #27.3, 5, 15, 25, 39, 45, 57, 75, 79 To be prepared for your 2nd recitation during the week of March 12-14: #27.51 [Hall Effect] #27.72 [Electromagnetic Rail Gun] #27.89 [Magnetic Deflection] 1. [Magnetic Force on an Electron ] An electron moves with speed 5.0 x 10 5 m/s in a uniform magnetic field of 0.60 T that points East. At some instant, the magnetic force on the electron is 4.0 x 10-14 N upward. (a) In what direction is the electron moving at that instant? [If there's more than one possible direction, give all the possibilities.] On a carefully drawn and labeled diagram, show the (possible) direction(s) of the electron's velocity relative to the magnetic field and force. (b) What's the greatest force that this magnetic field could produce on an electron moving at this speed? Show the direction of that electron's velocity relative to the field. 2.
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This note was uploaded on 09/09/2008 for the course PHYS 2213 taught by Professor Perelstein,m during the Spring '07 term at Cornell.