Which of the following properties of a proton can change while it moves freely in a mangetic field? (There may be more than one correct answer).

Options

A. (a) mass
B. (b) speed
C. (c) velocity
D. (d) momentum

Answer

C, D

Explanation

Whenever a charnged particle (in this case a proton) moves in a mangetic field, its velocity and as a result of this its momentum change. Thus, (c) and (d) are the properties which change when a proton moves freely in a magnetic field.