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17. A charged particle is projected with velocity vo along positivex-axis. The magnetic field B is directed along negative z-axis between x = 0 and x = L. The particle emerges out (atx L) at an angle of 60° with the direction of projectionFind the velocity with which the same particle is projected(at x 0) along positive x-axis so that when it emerges out(at x = L), the angle made by it is 30° with the direction ofprojection(1) 2Vo(3) vo /3(2) V/2(4) vo3 |
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