Magnetic field due to currentMedium
Question
A particle of charge ′q′and mass ′m′ enters normally (at point P) in a region of magnetic field with speed v. It comes out normally from Q after time T as shown in figure. The magnetic field B is present only in the region of radius R and is uniform. Initial and final velocities are along radial direction and they are perpendicular to each other. For this to happen, which of the following expression(s) is/are correct -
Options
A.B = 
B.T = 
C.T = 
D.None of these
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