Read the situation answer the question:
Meena forgot to switch OFF her electromagnetic crane model after use. After some time, the crane could not lift metal pins, but the coil around the nail was still warm. Why did the crane stop working? Give possible reasons.
A coil wrapped around an iron nail becomes an electromagnet only when flows through it.
If the flow of current stops, the nail .
Due to the heating effect, electrical energy changes into , causing the wire to become warm.
The wire remains warm for some time because takes time to occur.