What's electromagnetic field in easy words?

Dear student, 
-An electromagnetic field (also EMF or EM field) is a physical field produced by moving electrically charged objects. 
-The electromagnetic field extends indefinitely throughout space and describes the electromagnetic interaction.
-The electric field is produced by stationary charges, and the magnetic field by moving charges (currents): these two are often described as the sources of the field.
Image of electric field due to positeve charge

Regards 

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