what is electromagnetism
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Electromagnetism is a branch of physicsinvolving the study of the electromagnetic force, a type of physical interaction that occurs between electrically charged particles. The electromagnetic force usually exhibits electromagnetic fields such as electric fields, magnetic fields and light, and is one of the four fundamental interactions (commonly called forces) in nature. The other three fundamental interactions are the strong interaction, the weak interaction and gravitation.
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The branch of physics that deals with the study of magnetic effect of current and its applications is known as electromagnetism.
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