# rev4sm10 - TA Tomoyuki Nakayama Thursday PHY 2048 Physics 2...

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TA: Tomoyuki Nakayama Thursday, June 17, 2010 PHY 2048: Physics 2 with Calculus, Summer C 2010 Review (Chapter 28.1- 28.10) The purpose of this review is to refresh your memory. Physics is a cumulative subject, so make it sure that you understand basic concepts and typical problem solving techniques in previous chapters before moving on to a new chapter. ________________________________________________________________________________ A. Motion of Charged Particles in a Magnetic Field In the figure, a particle moves along a circle in a region of uniform magnetic field of magnitude B = 0.5 T. The particle is either a proton or an electron. It experiences a magnetic force of magnitude 4 × 10 -15 N. What are the particle’s speed, the radius of the circle and the period of the motion? B. Magnetic Force on a Current Carrying Wire A 1.0 kg metal rod rests on two horizontal rails 0.5 m apart and carries a current of 20 A from one rail to the other. The coefficient of static friction between the rod and rails is 0.75. What is the minimum magnetic field that puts the rod on the verge of sliding? C. Torque on a Current Loop

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rev4sm10 - TA Tomoyuki Nakayama Thursday PHY 2048 Physics 2...

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