- #1
mlazos
- 49
- 0
If we have a moving particle in a magnetic field the work of the magnetic field is always zero? Is not possible the magnetic field to accelerate charges?
mlazos said:The total kinetic energy will increase right? can we say that at the end the particle is accelerated since the kinetic energy is growing?
mlazos said:But what happens to the kinetic energy when the particle is not moving perpendicular but paraller to the magnetic field?
The particle will get some torational velocity too that will be added to the total kinetic energy! right?
jtbell said:If the particle's velocity is parallel to the magnetic field, then the magnetic force on the particle is zero. In general, the magnitude of the magnetic force is
[tex]F_{mag} = q v B \sin \theta[/tex]
where [itex]\theta[/itex] is the angle between the magnetic field and the particle's velocity. If the particle's velocity is parallel to the magnetic field, then [itex]\theta = 0[/itex] and therefore [itex]F_{mag} = 0[/itex] also.
Why do you think the particle will gain rotational velocity when there is no magnetic force acting on it?
No, a magnetic field alone cannot accelerate a stationary charge. A magnetic field only affects charges in motion, causing them to change direction, but not speed up or slow down.
A moving charge experiences a force perpendicular to its velocity when in the presence of a magnetic field. This force is known as the Lorentz force and causes the charge to move in a circular path.
No, a magnetic field can only cause a charged particle to move in a circular path. To accelerate a charged particle in a straight line, an electric field is needed.
No, according to Einstein's theory of relativity, it is not possible for any object with mass to reach the speed of light. Therefore, a magnetic field cannot accelerate a charged particle to the speed of light.
Yes, in certain situations, a magnetic field can indirectly accelerate a charged particle through the generation of electromagnetic waves. This process is known as synchrotron radiation and is utilized in particle accelerators.