Question

Consider a magnetic force acting on an electric charge in a uniform magnetic field. Which of the following statements are true? Check all that apply. Check all that apply. An electric charge moving parallel to the magnetic field experiences a magnetic force. The direction of the magnetic force acting on a moving electric charge in the magnetic field is perpendicular to the direction of motion. An electric charge moving perpendicular to the magnetic field experiences a magnetic force. The magnetic force is exerted on a stationary electric charge in the uniform magnetic field. The direction of the magnetic force acting on a moving charge in the magnetic field is perpendicular to the direction of the magnetic field.

Answer 1

Answer: 5) "The direction of the magnetic force acting on a moving charge in the magnetic field is perpendicular to the direction of the magnetic field"

3) "An electric charge moving perpendicular to the magnetic field experiences a magnetic force"

Explanation:

When a charge of magnitude q, moving with a velocity v is placed in a magnetic field of strength B, it experiences a force, the magnitude of this force F is given mathematically as

F =qvB sinx

Where x is the angle between the magnetic field and the velocity of the charge.

From this equation, we can see that the force is zero when magnetic field strength B is parallel to velocity (x=0) or when velocity v is zero.

Also the force F is maximum when the angle between magnetic field strength B and velocity is 90 ( that's they are perpendicular).

By the right hand rule, the force, velocity and strength of magnetic field are perpendicular to each other.

These points have made statement 3 and 5 of the questions to be correct.