[102] A beam of protons, each of which possesses a kinetic energy K = 4.00 10^5 eV, is projected into a uniform magnetic field with a magnitude of 3.00 10^(-2) T. The direction of the beam and the direction of the magnetic field are perpendicular to each other.

1. Calculate the period and radius of the trajectory described by a proton.
2. Determine how the radius and period of the circular trajectory described by a proton vary with K.

[2,19 x 10 * s; 3,05 m; ro VK; T indipendente da K]