Question

Ankita saw a crane lifting up iron pieces without the help of a hook. She was amazed to see it. Her friend Richa explained to her how this was possible. This satisfied the curiosity of Ankita

Answer 1

This is due to the electromagnets used on cranes.
An electromagnet is a soft metal core made into a magnet by the passage of electric current through a coil surrounding it.Electromagnets are based on the magnetic effect of current and electromagnets show magnetic properties only as long as the electric current flows through the coil. These are temporary magnets. These are of very high strength and can be made easily. These are used on cranes for lifting heavy loads.
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