A charged particle moves with constant velocity v = 2.00 × 10 6 m/s in a uniform magnetic field B =.

A charged particle moves with constant velocity v = 2.00 ×
10 6 m/s in a uniform magnetic field B = 0.50 T on a circular orbit whose plane
is perpendicular to the magnetic field. The radius of the orbit is equal to R =
2.00 cm and the kinetic energy of the particle W = 2.00 × 10 4 eV. Determine
(a) the charge of the particle, (b) the potential difference that accelerates
the particle from rest to v = 2.00 × 10 6 m/s before entering into the magnetic
field, and (c) the magnetic moment _m of the cyclotron orbit.