Q2. In the figure, a particle moves along a circle in a region of uniform magnetic field of magnitude B = 4.00 mT. The magnetic field is directed out of the page. The particle is either a proton or an electron (you must decide which). It experiences a magnetic force of magnitude FB = 3.20 x 10-15N. What are (a) the particle's speed, (b) the radius of the circle, and (c) the frequency and the period of the motion? O OB
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