An upward force act on a proton as it moves with a speed of 2.0 x 10^5 meters/seconds through a magnetic field of 8.5 x 10^2

Force on a moving charge is given by formula

here we know that this force will be maximum when velocity is perpendicular to magnetic field

here we know that

now we have

i dont know but

explanation:

whoever your teacher is, deserves a raise for using pokemon as an example

your answer is, orbit around the nucleus