What causes the poles of the electromagnet in an audio speaker to repeatedly switch directions? a metal striker that pulls on the magnet a diaphragm that vibrates around the magnet a current that rapidly

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asked Apr 21, 2022 170k views

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What causes the poles of the electromagnet in an audio speaker to repeatedly switch directions?

a metal striker that pulls on the magnet
a diaphragm that vibrates around the magnet
a current that rapidly switches direction
a device that opens and closes a circuit