Motion of a wire in a magnetic field

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SUMMARY

The motion of a wire in a uniform magnetic field B is determined by the Lorentz force, expressed as F=I(lxB). This force acts perpendicular to both the magnetic field and the current flowing through the wire. Consequently, without any constraints, the wire will exhibit straight motion rather than circular motion. This conclusion is based on the fundamental principles of electromagnetism.

PREREQUISITES
  • Understanding of Lorentz force law
  • Basic knowledge of magnetic fields
  • Familiarity with current and its direction in conductors
  • Concept of vector cross products
NEXT STEPS
  • Study the implications of the Lorentz force on different conductor shapes
  • Explore the effects of constraints on wire motion in magnetic fields
  • Learn about electromagnetic induction and its applications
  • Investigate the relationship between current, magnetic fields, and force direction
USEFUL FOR

Physics students, electrical engineers, and anyone interested in the principles of electromagnetism and the behavior of conductors in magnetic fields.

eoghan
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Hi there!
If a wire is surrounded by a uniform magnetic field B, then there is a force F=I(lxB). By this force, what is the motion of the wire? Is it a circular motion or a straight motion?
 
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The force, from Lorentz law, as you have written, is always perpendicular to both the magnetic field and to the current in the wire. Without costraints, the motion is also perpindicular to the wire, so it is straight motion.
 

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