Speed of Charged Particle - General Physics - Past Paper, Exams of Physics

Download Speed of Charged Particle - General Physics - Past Paper and more Exams Physics in PDF only on Docsity! St. Vincent College PH 112-03: General Physics 2 Exam 4 3/27/2009 The exam consists of 4 questions. The questions may not be worth the same number of points, so read the entire exam before beginning work. You must show your work in order to get full credit. Problem 1 25 Problem 2 25 Problem 3 25 Problem 4 25 Total 100 ke = 8.99 × 10 9 N·m2/C2 ǫ0 = 8.854 × 10 −12 C2/N·m2 e = 1.6 × 10−19 C me = 9.11 × 10 −31 kg mp = 1.67 × 10 −27 kg µ0 = 4π × 10 −7 T·m/A 1. (25 pts) a) (5 pts) Can the force exerted by a uniform magnetic field change the speed of a charged particle moving through it? Explain. b) (5 pts) Two parallel wires each carry current. Why is there a force between them? c) (5 pts) Is it possible to put a current-carrying loop of wire into a magnetic field yet have no torque act on it? If not, why not? If so, how? d) (5 pts) You take one of those new electronic compass gizmos with you on the first manned mission to Mars. During one extra-vehicular activity (i.e. walking around outside) you notice that the compass gizmo points 5◦ to the left and up at 30◦. In what direction is the magnetic field there? e) (5 pts) Looking end-on to a solenoid, the current flows around it in a counter-clockwise fashion. In what direction is the magnetic field inside the solenoid?