Explain what do you understand by magnetic induction. What role does it play in attraction of a piece of iron by a magnet ?
The process in which a piece of magnetic material acquires the magnetic properties temporarily in presence of another magnet near it is called the magnetic induction.
When a piece of iron is placed near or in contact with a magnet, the piece of iron becomes a magnet i.e., it acquires the property of attracting iron filings when they are brought near its ends. Thus, a piece of iron behaves like a magnet as long as it is kept near (or in contact with) a magnet.