How can you explain that steel objects carried by the electromagnetic crane do not fall away from the electromagnet after the current is turned off? What should be done so that adhered objects fall off immediately?
Steel objects do not fall off the electromagnet after turning off the current. since they remain magnetized. To make the objects fall off, it is enough to pass a small current in the opposite direction through the winding of the electromagnet, and the steel objects will be demagnetized.
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