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Evagoras
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We know a magnet has field with direction from North to South. Why when a piece of iron come close to the magnet can either be attracted and from both sites and not for example from one pole?
A magnetic field is an invisible force field that surrounds a magnet or an electric current. It is responsible for the attraction or repulsion of magnetic materials.
Magnetic field attraction occurs when opposite poles of two magnets are brought close together. The magnetic field lines from one magnet interact with the magnetic field lines from the other magnet, causing them to attract each other.
The strength of magnetic field attraction is affected by the distance between two magnets, the strength of the magnets themselves, and the orientation of their poles.
Yes, magnetic field attraction can be turned on or off by manipulating the electric current that creates the magnetic field. For example, an electromagnet can be turned on by connecting it to a power source and turned off by disconnecting it.
Magnetic field attraction has many practical applications, such as in motors, generators, speakers, and MRI machines. It is also used in magnetic levitation trains and magnetic compasses for navigation.