above the earth, a 500nT magnetic field captures particles coming from the sun. If a proton moving at 600km/s runs into this magnetic field, what is the radius of motion of the proton? and also how long does it take the proton to travel in one circle?

Answer 1

Force=Bvq and Force=mv^2/r

set the two equations equal, and solve for r.

period=2PIr/velocity