Action reaction pair of magnetic force

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SUMMARY

The discussion focuses on the relationship between magnetic force and its reaction, specifically how it relates to the equation qvb, where q represents charge, v is velocity, and b is the magnetic field. It emphasizes the need to generalize Newton's third law to understand the conservation of momentum in electromagnetic fields. The conversation highlights that while discussing forces on fields may seem abstract, it is crucial to consider the momentum changes in the field itself. Resources such as the University of Texas and Duke University's websites are recommended for further exploration of electromagnetic concepts.

PREREQUISITES
  • Understanding of Newton's Third Law of Motion
  • Basic knowledge of electromagnetic fields
  • Familiarity with the equation qvb in the context of magnetic forces
  • Concept of momentum in physics
NEXT STEPS
  • Research the conservation of momentum in electromagnetic fields
  • Explore the concept of momentum associated with the magnetic field (B field)
  • Study advanced electromagnetic theory through resources like the University of Texas lecture notes
  • Investigate Duke University's materials on electromagnetism for deeper insights
USEFUL FOR

Physics students, educators, and anyone interested in understanding the principles of electromagnetism and the relationship between magnetic forces and momentum.

rtshah
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I am not able to understand reaction of magnetic force and how it is equal to qvb ?
 
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When you start looking at fields you have to generalize Newton's third law. Basically Newtons third law expresses the conservation of momentum. While it may not make a lot of sense to talk about the force on a field, you can certainly talk about its momentum. Any force that the field exerts on matter causes an equal and opposite change in the momentum of the field.
 
DaleSpam said:
When you start looking at fields you have to generalize Newton's third law. Basically Newtons third law expresses the conservation of momentum. While it may not make a lot of sense to talk about the force on a field, you can certainly talk about its momentum. Any force that the field exerts on matter causes an equal and opposite change in the momentum of the field.

What is the momentum of the B field? I haven't heard of this concept yet. Any suggestions on some good reading in this subject?
 

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