Question

#2,3,4

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 a 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. Find the direction of the instantaneous ac- celeration â at t = 0 if g is negative. 1. â = 3 2. a = 3. a = 4. â=-kui 5. a =k+i 6. â= -j 7. â =j+ 8. a = -1 9. a=i+j 10. â = -k 002 (part 1 of 3) 10.0 points The magnetic field over a certain range is given by B = B_{+By], where B. = 4 T and By = 2 T. An electron moves into the field with a velocity ő = 0; i+vyj+v-k, where Uz = 7 m/s, vy=6 m/s and v. = 6 m/s. The charge on the electron is -1.602 x 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 É and B region undeflected. 1. B= 2. B = -1 Val-3+k) 3. B = +1 4. B = + 5. B = +

Answer 1

a charge We know the magnetic force on particle of charge a, moving with velocity È = 90 x B 99 . « K q 07 Vy VĄ Br By Be i A 19 K =q 6 6 4 2 t(-2) + (24) + (14 -24 9(-121+ + 249 - 10%) 2.) Fox -129 = 12 X 106x1019 N N. 1092x1018 3 Fy = 242 = -24x 1,6 x 10-19 M. = -3.84x16-18 N 9 Fe 19 : 10 x 1'6X16 a m109 116 X1078 N.