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Question

The strength of an electromagnet can be increased by


A

reversing the direction of current

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B

increasing current in the coil

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C

decreasing the number of turns of the coil

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D

All of these

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Solution

The correct option is B

increasing current in the coil


An electromagnet is a temporary magnet made by winding an insulated wire in numerous turns, usually around a soft iron core. As current flows through the coil. it starts behaving like a bar magnet. The strength of the magnet increases as we increase the current flowing through the wire,


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