Question

Discuss how the iron core changes the magnitude of induced voltagewhen it is inserted in a solenoid. What physical property of the ironcore causes this change? Describe and explain the origin of this physicalproperty and how it might possibly affect the induced voltage at themicroscopic level (hint: electrons). What would happen if a coppercore was used instead?

Answer 1

When we add an Iron Core inside a Solenoid, The Strength of the Magnetic Field will Increases as due to the Iron,The field lines will get more concentrated to the centre(Iron is Ferromagnetic).And As the Magnetic field increases, The Voltage induced will also increase .

Eventualy he solenoid will transform into a permanent magnet.

The property which causes this change is Ferromagnetism.

Ferromagnetism-Its Basic origin is the very spin of electrons inside an orbital in an atom,Though there is also a contribution from the orbital angular momentum of the electron about the nucleus.It is the mechanism by which Certain materials have the ability to form Permanent Magnets.Only to natural materials have this property

1.)Lodestone

2.)Pure Iron

Copper,It is A diamagnetic substance.Hence it would NOT INCREASE the Magnetic field Nor The Induced EMF.