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) velocity c)speed d)momentum​

Answer 1

C.
velocity

D.
momentum

The correct options are (c) and (d). The magnetic force acts perpendicular to the direction of motion of the proton. It does not change its mass and speed but changes its direction of motion. So both velocity and momentum get changed.
The correct options are (c) and (d). The magnetic force acts perpendicular to the direction of motion of the proton. It does not change its mass and speed but changes its direction of motion. So both velocity and momentum get changed.