Why charge density of moving dipole is dependent on time?

  • #1
Lokesh
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Here is the link to the paper: https://doi.org/10.1119/1.4712308
This paper aims to resolve the inconsistency between different transformation equations by expressing the electric current created by a moving electric dipole as the sum of polarization and magnetization currents and calculating the resulting magnetic field. Here they take
charge density to be dependent on time. Why?
 
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  • #2
:welcome:

I don't want to spend $ 40 to purchase access to the article. Is it perhaps the same as this one ?

In that case equation ##(5)## answers your question:$$\rho_b({\bf r},t)=-{\bf\nabla\cdot P}({\bf r},t)=-{\bf p}_0{\bf \nabla}\delta({\bf r}-{\bf r}_0(t))$$the dipole is moving, so the charge distribution in space is not constant in time.

##\ ##
 
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Likes berkeman
  • #3
And why is the author of that paper from NIOSH? That's weird...
 
  • #4
berkeman said:
And why is the author of that paper from NIOSH? That's weird...
IMG_0071.jpeg
 
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Likes jim mcnamara and berkeman

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