Magnetic field of moving charged particle

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SUMMARY

The discussion focuses on modeling the magnetic field generated by a moving charged point particle, specifically addressing the limitations of the Biot-Savart Law for non-steady currents. It concludes that while a charged particle passing through a conducting loop generates an azimuthal magnetic pulse, no induced azimuthal electromotive force (EMF) occurs due to the absence of net magnetic flux linking the loop. The mathematical representation of the magnetic field is given by the equation \vec{B}(\vec{r})=\dfrac{\mu_0}{4\pi}\dfrac{e (\vec{v} \times \hat{r})}{r^2}, highlighting the effects of relativistic speeds on the field's characteristics.

PREREQUISITES
  • Understanding of the Biot-Savart Law
  • Familiarity with electromagnetic field theory
  • Knowledge of relativistic effects on charged particles
  • Basic principles of electromotive force (EMF)
NEXT STEPS
  • Study the implications of the Biot-Savart Law for steady versus unsteady currents
  • Explore the mathematical modeling of electromagnetic fields for moving charges
  • Investigate the concept of magnetic flux and its relation to induced EMF
  • Learn about the Lorentz force and its effects on charged particles in motion
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Physicists, electrical engineers, and students studying electromagnetism, particularly those interested in the behavior of magnetic fields generated by moving charged particles.

grundletaint
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What is the appropriate way to model the magnetic field of a moving charged point particle?

I don't believe you can use Biot-Savart because it is not a steady current.

I am trying to figure out what EMF (current) would be induced in a square or round conducting loop when a charged point particle passes through it.

Thanks
 
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Maybe BS Equation help, integrating over a single point.

[tex]\vec{B}(\vec{r})=\dfrac{\mu_0}{4\pi}\dfrac{e (\vec{v} \times \hat{r})}{r^2}[/tex]
 
The point charged particle moving through a loop will develop an azimuthal magnetic pulse, but because there is no net magnetic flux linking the loop, there will be no induced azimuthal EMF. The magnetic field from either a point charge-current or a steady current is azimuthal, and the electric field is radial. For relativistic point charges, the longitudinal extent of the fields are collapsed by the factor gamma, so the observed pulses are very short, and very high amplitude.
 

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