what is an Electromagnetic how it is different from permanent magnet mention two application of Electromagnet other than electric bell
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hey mate,
Definition of electromagnet. :
A core of magnetic material (such as iron) surrounded by a coil of wire through which an electric current is passed to magnetize the core.
An Electromagnet loses its magnetic properties after the current is switched off whereas a Permanent magnet retains its magnetic properties forever..
Electromagnets are very widely used in electric and electromechanical devices, including:
Motors and generators.
Transformers.
Relays.
Electric bells and buzzers.
Loudspeakers and headphones.
Actuators such as valves.
Magnetic recording and data storage equipment: tape recorders, VCRs, hard disks.
MRI machines,etc.
...hope this helps...
Definition of electromagnet. :
A core of magnetic material (such as iron) surrounded by a coil of wire through which an electric current is passed to magnetize the core.
An Electromagnet loses its magnetic properties after the current is switched off whereas a Permanent magnet retains its magnetic properties forever..
Electromagnets are very widely used in electric and electromechanical devices, including:
Motors and generators.
Transformers.
Relays.
Electric bells and buzzers.
Loudspeakers and headphones.
Actuators such as valves.
Magnetic recording and data storage equipment: tape recorders, VCRs, hard disks.
MRI machines,etc.
...hope this helps...
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