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Name: ___________________________ Notes – 22.5-22.6 Circular Motion in a Magnetic Field Lines and Crossed E and B Fields 1. Motion of a Charged Particle Moving Perpendicular to a Uniform Magnetic Field A. Determine the direction of the force and path of the charged particle. B +q v B. Determine the velocity of the charged particle. C. Determine the radius of the charged particle. D. Determine the period and frequency. 2. Crossed E & B Fields A proton with just the right velocity will pass straight through the apparatus shown below from left to right that has crossed E and B fields that are perpendicular to each other. The electric charges on the upper and lower plates are shown. + + + + + + + + + - - - - - - - - v A. Draw the free-body diagram for the proton with the force vectors FE and FB. B. In what direction does the magnetic field point? C. In terms of E and B, what is the magnitude of the proton's velocity?