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This print-out should have 14 questions. Multiple-choice questions may continue on the next column or page - find all choices before answering 001 10.0 points A particle with charge q and mass m has speed v. At t = 0, the particle is moving along the negative r axis in the plane perpendicular to the magnetic field B, which points in the positive : direction in the figure below. 10-"c. What is the i component of the force ex- erted on the electron by the magnetic field? Answer in units of N 003 (part 2 of 3) 10.0 points What is the component of the force? Answer in units of N. 004 (part 3 of 3) 10.0 points What is the k component of the force? Answer in units of N 005 10.0 points Find the magnitude of the magnetic force on a proton moving with velocity 4.36 Mm/s in the positive r direction in a magnetic field of 1.95 T in the positive z direction. Answer in units of pN. 006 (part 1 of 2) 10.0 points Consider the setup of a velocity_selector for the case where the electric field Ē is pointing downward along y axis. YA Find the direction of the instantaneous ac- celeration â at t = 0 if g is negative. 1. a=; 2.ai 3. = 4.-kti 5. a =k+i 6. â= -1 7. a =j+ 9. a=i+j 10. a = - 002 (part 1 of 3) 10.0 points The magnetic field over a certain range is given by B = B i + B, ), where B. = 4T and B, = 2 T. An electron moves into the field with a velocity j = ; i+wy3+u, k, where Vr = 7 m/s, wy = 6 m/s and v. = 6 m/s. The charge on the electron is -1.602 Choose the direction of the magnetic field B such that a negatively charged particle, moving at an appropriate speed in the positive 2-direction (i), passes through the and B region undeflected 1. B ==-3+) V2 2. B = -1 3. B = + 4.B + 5. B = +j

Answer 1

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