What is electromagnetic induction ?

What is electromagnetic induction ?
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Electromagnetic induction is a process by which , in effect, a "conductive" voltage is created. This process occurs when a variable magnetic field is placed between a conductor in a magnetic field or a moving conductor within a static magnetic field. Then the magnetic field line of that magnetic field hits the conductor. It is the relative motion between the magnetic field line and the conductor that creates the electromagnetic induction.
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