How do change in magnetic flux induces emf in a coil ?

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SUMMARY

The discussion centers on Faraday's laws of electromagnetic induction, specifically how a change in magnetic flux induces electromotive force (emf) in a coil. It is established that while an electric field is necessary for electron conduction, an electric field is induced in the coil due to the changing magnetic field, as described by Maxwell's equations. The curl of the electric field corresponds to the negative rate of change of the magnetic field over time, facilitating the movement of electrons in the coil without energy loss.

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hanii
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According to Faraday's laws... change in magnetic flux linking a coil induces current in the coil.., but for conduction of electrons ...there must be an electric field ! how is the electric field induced in the coil??
 
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welcome to pf!

hi hanii! welcome to pf! :wink:
hanii said:
… for conduction of electrons ...there must be an electric field !

not true …

for example, an electron moving in and perpendicular to a purely magnetic field will move in a circle at constant speed …


(and if it moved through an electric field, it would do work and either lose or gain energy, but here it doesn't)
 
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The curl of the electric field is equal to the negative of the change in the magnetic field with respect to time. Take a look at Maxwell's equations. So, when there is a changing magnetic field (which we have in this case), an electric field is induced which drives the electrons around the coil.
 

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