What is an electromagnet Describe the construction and working of an electromagnet with the help of a labelled diagram

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Electromagnet is formed when electric current flows through a coil (conductor) wrapped around a core (of metal). Its magnetism lasts till electricity flows through it. 

If a wire is wrapped around a ferromagnetic material (those which are attracted by a magnet) and a current is flown through the wire, the material behaves like a magnet. This phenomenon is known as electromagnetism. The electromagnet can attract other ferromagnetic material just like any magnet. Usually a soft iron-core is used for good results. By such a phenomenon you get a temporary magnet whose magnetic property can be switched on or off by a switch.

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electromagnets are composed of a coil of a wire, some magnetic metal and current is used to generate electricity. this is known as electromagnet . to make an elecrtromagnet either
a) use more current or
b) increase the no. of coil rotation 
 
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An Electromagnet is a type of magnet consisting of coils of insulated copper wire wrapped around a core material that is magnetised only by using electric current is passed  through coil.  


So as you see a structure of electromagnet above,it is coiled and connected with a circuit,when the switch is on the electrons start flowing and makes the soft iron magnetised hence a magnetic field is created in vicinity of the iron.but when the switch is turned of then it immediately loses its Magnetism 

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thank you
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