Question 1
Which of the following property of a proton can change while it moves freely in a magnetic field? (There may be more than one correct answer.)
(a) mass
(b) speed
(c) velocity
(d) momentum
Correct Option: (c) and (d)
Velocity and mass of a proton changes when it enters a magnetic field. When proton enters a magnetic field it starts moving on a circular path. Because of its movement along a circular path it attains angular momentum.