A proton with a kinetic energy of 2.0 eV moves into a region of uniform magnetic field of magnitude π/2 x 10-3 T. The angle between the direction of magnetic field and velocity of proton is 60°. The pitch of the helical path taken by the proton is ____ cm.
(Take, mass of proton = 1.6 × 10-27 kg and Charge on proton = 1.6 × 10-19 C).
