An alpha particle (q = +2e, m = 4.00 u) travels in a circular path of radius 4.50 cm in a uniform magnetic field with B = 1.80 T.
(a) Calculate its speed.
(b) Calculate its period of revolution.
(c) Calculate its kinetic energy in electron-volts.
(d) Calculate the potential difference through which it would have to be accelerated to achieve this energy.