Why does the speed of the magnet matter in a coil?

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SUMMARY

The speed of a magnet moving through a coil directly affects the induced electromotive force (emf) according to Faraday's law of electromagnetic induction. When a bar magnet is passed through a coil, the faster the magnet moves, the greater the change in magnetic flux experienced by the coil, resulting in a higher induced voltage. If the magnet is stationary, no emf is induced, as there is no movement of magnetic flux lines cutting through the coil. This principle is fundamental in understanding electromagnetic induction and its applications.

PREREQUISITES
  • Understanding of Faraday's law of electromagnetic induction
  • Basic knowledge of magnetic fields and flux
  • Familiarity with the concept of electromotive force (emf)
  • Knowledge of coil and magnet interactions
NEXT STEPS
  • Study the mathematical formulation of Faraday's law
  • Explore the Lorentz force and its implications in electromagnetism
  • Investigate applications of electromagnetic induction in generators
  • Learn about the role of magnetic flux in electrical engineering
USEFUL FOR

Students of physics, electrical engineers, and anyone interested in the principles of electromagnetism and its practical applications.

alfab
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I am currently studying Faraday's law and electromagnets and in class we were told that if you had a coil and say a bar magnet was passed through it the faster the magnetic field was applied to the coil the greater the induced voltage or emf would be. I do not understand why the speed would matter if the magnetic field was constant from the bar magnet and the magnetic flux would be the same. Why would it be greater if the magnet was moving faster?
 
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alfab said:
I am currently studying Faraday's law and electromagnets and in class we were told that if you had a coil and say a bar magnet was passed through it the faster the magnetic field was applied to the coil the greater the induced voltage or emf would be. I do not understand why the speed would matter if the magnetic field was constant from the bar magnet and the magnetic flux would be the same. Why would it be greater if the magnet was moving faster?
How much emf is induced if the magnet is just placed inside the coil and left stationary?
 
phinds said:
How much emf is induced if the magnet is just placed inside the coil and left stationary?
it would be 0 correct? because if the magnet is not moving at all the electrons in the coil are not moving
 
alfab said:
it would be 0 correct? because if the magnet is not moving at all the electrons in the coil are not moving
Yes, exactly. I was trying to lead you to the understanding on your own that jedishrfu has now provided to you.
 
okay thank you this makes a lot more sense now
 

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