A charged particle of charge +q, mass m is moving with initial velocity 'v' as shown in figure in a uniform magnetic field B(−k). Select the correct alternative / alternatives :
Time for which the particle was in magnetic field is πm6qB
Time for which the particle was in magnetic field is πm3qB
Distance travelled in magnetic field is πmv6qB
The particle will never come out of magnetic field
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Refer to the figure. angle between the initial velocity and the boundary of the field =300 ∠AOC=600 Thus, the particle trajectory subtends an angle of 600 at the center of the circle. ∴ time spent by the particle inside the magnetic field is 16th the time period T. Since T=2πmqB, time spent inside the magnetic field is 16×2πmqB=πm3qB
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