Magnet moving in a long long solenoid

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SUMMARY

The discussion centers on the behavior of induced electromotive force (emf) when a magnet moves inside a solenoid. It is established that even when a magnet moves at speed v within a solenoid, induced emf occurs due to the changing magnetic flux linkage, as described by Faraday's Law of Electromagnetic Induction. The differing number of coil turns on either side of the magnet results in a net induced emf, confirming that induced currents can arise to oppose the magnet's motion. The conversation emphasizes the importance of understanding induced emf in this context.

PREREQUISITES
  • Faraday's Law of Electromagnetic Induction
  • Understanding of solenoids and their magnetic fields
  • Concept of induced emf and current
  • Basic principles of magnetism and magnetic poles
NEXT STEPS
  • Study the mathematical formulation of Faraday's Law
  • Explore the concept of magnetic flux and its calculation
  • Learn about Lenz's Law and its application in electromagnetic induction
  • Investigate the effects of varying coil turns in solenoids on induced emf
USEFUL FOR

Physics students, educators, and anyone interested in understanding electromagnetic induction and its applications in solenoids and magnetic fields.

Deathnote777
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I have heard that when a magnet is moving completely inside a solenoid, there will be no induced emf. Is that true ? Personally, I think even the magnet is moving inside a solenoid with speed v, there will still be induced emf.

Assume a magnet is moving inside a solenoid from left to right. Right side is north pole and left is south. When it's moving in the solenoid, there will be current induced in the right side to oppose the north pole of the magnet. As for the left side, an opposite-direction current will be induced to attract the south pole. In this case, since the no. of turns of coil is different between the right side and left side from the magnet (assume the magnet is not in the middle), the will be net emf induced. Am I right ? Thx~
 
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Faradays law of electromagnetic induction states that WHENEVER a conductor experiences a changing magnetic flux linkage an emf will be induced...so yes...you are on the right track.
It is always wise in this area of physics to start, and concentrate on induced EMF...you may not get an induced current !
 

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