A)The particle always experience a magnetic force that changes its speed. B)The

Question

A)The particle always experience a magnetic force that changes its speed.

B)The particle may experience a magnetic force, and its speed will not change.

C)The particle may experience a magnetic force that will cause its speed to change.

A charged particle moves within a static magnetic field. Which statement describes the magnetic force and any change in speed that the particle experiences?

A)The particle always experience a magnetic force that changes its speed.

B)The particle may experience a magnetic force, and its speed will not change.

C)The particle may experience a magnetic force that will cause its speed to change.

Explanation / Answer

B) option is correct

F =q v x B

It will not experience a force if V and B are parallel, so "always" in option (a) is wrong and when it will experience force, it will NOT change its speed but will change the velocity as force is perpendicular to the direction of motion here. So the charge will move in uniform circular motion. So (c) is also wrong and (b) is correct

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