An electric current flows through a loop of wire when you move a bar magnet toward it! Faraday's law, which describes this physical process, is the foundation of electric generators. One of the pillars of electromagnetic is the Faraday law.
The flux increases quickly as the magnet approaches the coil and eventually reaches the magnet inside the coil. Magnetic flux begins to decrease through the coil as it moves through it.
Since the intensity of the field lines directing from the front to the back of the loop are becoming stronger as the magnet's north pole approaches the loop, the flux through the loop caused by the magnet's field increases.
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