What kinds of motion do particles do in a uniform magnetic field? 40

If the charged particles are moving in a uniform magnetic field (the magnetic field is stationary), only the action of the magnetic field is considered. Then:

1. When the velocity of the charged particle is 0, the particle is not stressed and is still at rest.

2. When the velocity of the charged particle is not 0, and the direction of velocity is the same or opposite to the direction of the magnetic field, the particle is not forced, and it moves in a uniform linear velocity.

3. When the velocity of the charged particle is not 0 and the velocity direction is perpendicular to the direction of the magnetic field, the particle is subjected to the Lorentz force and moves in a uniform circular motion.

4. When the velocity of the charged particle is not 0, and the velocity direction is not perpendicular or parallel to the direction of the magnetic field, the particle is subjected to the Lorentz force and moves in a spiral line. (Uniform circular motion and uniform linear motion).

If there is only a uniform magnetic field, there are three cases:

1. The velocity is parallel to the magnetic field: uniform linear motion.

2. The velocity is perpendicular to the magnetic field: uniform circular motion.

3. There is a certain angle between the speed and the magnetic field: spiral motion.

Uniform acceleration of the straight line, first uniform deceleration of the straight line, then uniform acceleration of the straight line, the parabolic movement.

If it is perpendicular to the direction of the magnetic field, it will move in a uniform circle, and if it is parallel, it will not be affected by the electric field force and will move the same as the original state.

Charged particles move in a uniform circular motion and uncharged particles move in a straight line, provided that gravity is not considered.

The motion of charged particles in a composite field.

Does it take into account the gravitational force of the particles?

Uniform circular motion.

Lorentz force. It does not change the magnitude of the velocity of the charged particle, or in other words, the Lorentz force does not do work on the charged particle, and the direction of the Lorentz force is always perpendicular to the direction of velocity, which just acts as a centripetal force.

(change the direction of movement).

Extend your left hand so that your thumb is perpendicular to the remaining four fingers and all are in the same plane as your palm, allowing the magnetic lines.

Enter from the palm of your hand and point four fingers toward a positive charge.

The direction of the direction of motion, in which case the thumb is pointing is the direction of the Lorentz force on the energized wire in the magnetic field.

There are three kinds of trajectories of charged particles in a uniform magnetic field: uniform linear motion, uniform circular motion, and spiral orbital motion.

Uniform circular motion. The particle moves in a circle, and if the length of the arc is equal in the same amount of time, this motion is called "uniform circular motion", also known as "uniform circular motion". Because the velocity of the object does not change when it moves in a circle, but the direction of velocity changes when it touches the hall.

So the linear velocity of a uniform circular motion changes from moment to moment.

Calculation formula. 1. V (linear velocity) = δs δt = 2 r t = r = 2 rn (s represents arc length, t represents time, r represents radius, n represents speed).

2. (angular velocity) = δt = 2 t = 2 n (representing angle or radian) 3, t (period) = 2 r v = 2 1 n4, n ** velocity) = 1 t = v 2 r = 2 5, fn (centripetal force) = mr 2 = mv 2 r = mr4 2 t 2 = mr4 2n 2