Having exam tomorrow. Magnetic field between capacitors?

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SUMMARY

The discussion focuses on calculating the magnetic field generated by a circular capacitor with radius R, specifically for points where the distance r is greater than R. The user has successfully applied Ampere's Law to determine the magnetic field for r < R but is seeking assistance for the case when r > R. Additionally, the user inquires about the rate of change of charge on the capacitor, indicating a need for understanding the relationship between electric and magnetic fields in capacitors.

PREREQUISITES
  • Ampere's Law
  • Understanding of electric flux
  • Basic principles of capacitors
  • Magnetic field concepts
NEXT STEPS
  • Study the application of Ampere's Law for r > R in circular capacitors
  • Research the relationship between electric field and magnetic field in capacitors
  • Explore the concept of displacement current in electromagnetic theory
  • Learn about the time-varying electric fields and their effects on magnetic fields
USEFUL FOR

Students preparing for exams in electromagnetism, physics enthusiasts, and anyone studying the behavior of electric and magnetic fields in capacitors.

ippo90
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You have a circular capacitor (radius = R). Find the magnetic field from the central axis,
for r > R?

I have solved the first one for r<R by using ampere's law:

/B dr = my(I + d/dt(flux of electric field))

the answer is hard to write in a post like this, but I will do if necessary.

I have been trying hard but can't figure it out. Can you help me?

Thank you for all help!
 
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How fast does the charge on the capacitor change?
 

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