Question

what is the magnitude of the force experienced by a charged particle if it moves along the direction of magnetic field​

Answer 1

Answer:

Magnetic fields exert forces on moving charges. ... The direction of the magnetic force on a moving charge is perpendicular to the plane formed by v and B and follows right hand rule–1 (RHR-1) as shown. The magnitude of the force is proportional to q, v, B, and the sine of the angle between v and B.

Answer 2

"From Newton's second law of motion, we know that when an object experiences a net force, the object will accelerate in the direction of that net force. Since the only force acting on the particle is the force exerted by the magnetic field, this magnetic field force must be the net force.

Forces by magnetic fields on moving charged particles always act in a direction that is perpendicular to the velocity of the particle, meaning that they will never change the speed of the particle.

Since in this case the particle is experiencing a net force, the particle must be accelerating.

All of the vector quantities here are constantly changing since the particle is constantly changing direction.

The velocity direction is changing, the acceleration direction is changing, the momentum direction is changing along with the velocity, and the position is obviously changing.

The particle's speed does not change.