When the nail is brought near a pile of small paper clip, the nail will pick up some paper clips because its domains have been aligned.
What is magnet?
A substance which is negative charged at one end and positive charged at another end creating the magnetic field around it.
A nail is a magnet which can attract the particle which are charged.
The north pole of a strong magnet is dragged down an iron nail from the top to the point 50 times.
Thus, the nail will pick up some paper clips because its domains have been aligned.
Learn more about magnet.
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