Why Does EMF Cancel Out When a Magnet Moves Constantly Inside a Solenoid?

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SUMMARY

When a magnet moves at a constant speed through a solenoid, no induced electromotive force (emf) occurs while the magnet is fully inside the solenoid. This is due to the principle of magnetic flux linkage, where the increasing flux linkage from one pole of the magnet is countered by the decreasing flux linkage from the other pole, resulting in cancellation of the induced emfs across the solenoid's loops. The solenoid acts as a series of loops, and the net effect is zero emf when the magnet is centrally located within the solenoid.

PREREQUISITES
  • Understanding of Faraday's Law of Electromagnetic Induction
  • Knowledge of magnetic flux and its calculation
  • Familiarity with solenoids and their properties
  • Basic principles of electromagnetism
NEXT STEPS
  • Study Faraday's Law in detail to understand induced emf
  • Explore the concept of magnetic flux linkage in solenoids
  • Investigate the behavior of magnetic fields in different configurations
  • Learn about Lenz's Law and its application in electromagnetic systems
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Physics students, electrical engineers, and anyone interested in the principles of electromagnetism and electromagnetic induction.

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What will happen when I push a magnets into a solenoid with constant speed throughout? I understand that when the magnet leaves and enters an induced emf will occur, but in the middle no emf will occur. Why is this so? I thought that the magnetic flux linkage changes as it moves in the solenoid?
 
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As the magnet moves through the solenoid with both the pole inside, for each loop of the coil with increasing flux linkage, there is a loop with a decreasing flux equally, hence their emfs cancel each other out ( the solenoid is a combination of the loops in series).
 

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