Electromagnets are used in loudspeakers, electric bells and _______.

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Solution

An electromagnet is a kind of magnet where the magnetic field is created by an electric current.
The magnetic strength of an electromagnet can be easily altered by varying the amount of electric current.
The polarity of electromagnets can be changed by varying the direction of the electric current.
That is why it is used in electric motors as well.
Thus, Electromagnets are used in loudspeakers, electric bells and electric motors.

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