Why does passing current through a conductor produce a magnetic field?
Why does electromagnetic induction happen? Why is e.m.f produced?

Dear student,                     
​Please find below the solution to the asked query  
   

1. Moving charge produces a magnetic field around it. In a conductor when a current flows (current is rate of flow of charge) a magnetic field is produced around the conductor. Now when a current carrying wire is wound around an iron bar then the magnetic field due to the current makes its way through the iron bar. If this magnetic field is made to remain in the iron bar for a longer time it will eventually magnetize the iron bar.

2. When a conductor moves through a magnetic field a voltage is produced across the conductor this is called Electromagnetic induction. OR When a conductor is placed in a changing magnetic field causes the production of a voltage across the conductor is called Electromagnetic induction.

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