A charged particle is moving at right angles to a uniform magnetic field of flux density BBB. The particle has mass mmm, charge qqq, and moves in a circular path of radius r r\,r in the region of the magnetic field.
Which of the following sets of quantities is sufficient to determine the period of the circular motion of this particle?
BBB, qqq and mmm
BBB, qqq and rrr
qqq, rrr and mmm
BBB, rrr and mmm
