The answer to respective questions on electromagnetic induction, magnetic flux and solenoid are as follows
In the process of electromagnetic induction, a conductor is placed in a certain location while the magnetic field changes, or the magnetic field is stationary while the conductor is moving. A voltage or EMF (Electromotive Force) is created across the electrical conductor as a result.
Therefore, the basic symbol for increasing what you have in order to obtain more is +. These findings are in accordance with Faraday's law. Despite the possibility of a strong magnetic field being produced by the stationary magnet, no EMF can be formed because the flux flowing through the coil is constant. The flux rapidly increases as the magnet gets closer to the coil until it is within the coil. The magnetic flux through the coil starts to decrease as it moves through it. As a result, the induced EMF is turned around.
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