Electromagnet. Turn off the power supply you are using to run your electromagnet. ... This will reverse the polarity of the battery and change the direction of the electric current. By changing the direction of the current, you reverse the poles of the electromagnet.
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Answer:
Electromagnet. Turn off the power supply you are using to run your electromagnet. ... This will reverse the polarity of the battery and change the direction of the electric current. By changing the direction of the current, you reverse the poles of the electromagnet.
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