A particle of mass m and charge q moves in a uniform, constant magnetic field B. Show that if v is perpendicular to B, the particle moves in a circle of radius
![1102_a2cd2ba5-446b-4fb0-99fb-5e3b7d5b6b3e.png](https://secure.tutorsglobe.com/CMSImages/1102_a2cd2ba5-446b-4fb0-99fb-5e3b7d5b6b3e.png)
[This result agrees with the nonrelativistic result (2.81), except that p is now the relativistic momentum p = γmv.]