Magnetic field does no work -- true in all branches of physics?

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SUMMARY

The discussion confirms that magnetic fields do not perform work on charged particles across all branches of physics, including high energy physics. This is due to the fact that the force exerted by a magnetic field is always perpendicular to the velocity of the charged particle, thus not changing its kinetic energy. The role of magnetic fields is primarily to steer particle beams, while electric fields are responsible for altering kinetic energy. The mention of synchrotron radiation highlights the complexities of particle dynamics but does not contradict the established principle that magnetic fields do no work.

PREREQUISITES
  • Understanding of classical electromagnetism
  • Familiarity with charged particle dynamics
  • Knowledge of particle beam accelerators
  • Basic principles of synchrotron radiation
NEXT STEPS
  • Research the role of electric fields in particle acceleration
  • Explore the principles of synchrotron radiation in high energy physics
  • Study the effects of magnetic fields on particle trajectories
  • Learn about torque experienced by current loops in magnetic fields
USEFUL FOR

This discussion is beneficial for physicists, students of electromagnetism, and engineers working with particle accelerators, as well as anyone interested in the fundamental principles of charged particle dynamics.

CPW
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The force on a charged particle that is moving through a magnetic field is explained in introductory physics textbooks. The magnetic field cannot change the kinetic energy of the charged particle because the force from the magnetic field is always perpendicular to the velocity, so no work is done.

My question: Is that fact true in all branches of physics, such as high energy physics?
 
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Synchrotron radiation might be of your interest though I am not qualified to explain it.
 
anuttarasammyak said:
Synchrotron radiation might be of your interest though I am not qualified to explain it.

Hi. Thank you for the recommendation.

I studied particle beam accelerators, and those textbooks also state only the electric fields can be used to change the kinetic energy of the charged particle being accelerated. The magnetic fields do no work, even in situations when the charged particle's speed is relativistic. (The magnetic fields are used to steer the particle beam).

So, my thought is that magnetic fields do no work in all branches of physics. Even esoteric realms of which I am ignorant.

Please correct me if I am wrong about that.
 
It might interest the OP that a current loop and/or a magnetic moment in a magnetic field experiences a torque which can result in an increase in kinetic energy.
 
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