give reason why electromagnets are better than permanent magnet
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A permanent magnet is an object made from a material that is magnetized and creates its own persistent magnetic field. As the name suggests, a permanent magnet is 'permanent'. This means that it always has a magnetic field and will display a magnetic behavior at all times.
An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it. Often an electromagnet is wrapped around a core of ferromagnetic material like steel, which enhances the magnetic field produced by the coil.
An electromagnet is made from a coil of wire which acts as a magnet when an electric current passes through it. Often an electromagnet is wrapped around a core of ferromagnetic material like steel, which enhances the magnetic field produced by the coil.
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Electromagnet is better than Permanent magnet bcoz of the following reasons....:-
1) More magnetic strength
2) Magnetic Power as long as we want
3)Can be used everywhere where current is available
1) More magnetic strength
2) Magnetic Power as long as we want
3)Can be used everywhere where current is available
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