Question

9. An iron rod is repeatedly stroked many times with a magnet as shown below.
a. Can this process magnetize the rod?
b. How will the domains in the rod look like after this process? Explain with the help of
‘before’ and ‘after’ diagrams.

Answer 1

Explanation:

The term magnetism comes from the region of Magnesia, a city in Western Turkey, where Greeks found lodestones, which attracted iron pieces across the space. It is also observed that, magnets attract as well as repel. We can explain this dual nature of magnetic force by proposing that each magnet has two poles, north pole (N) and south pole (S). You will observe two things during the activities:

1) When two magnets are brought near each other, like poles repel; opposite poles attract.

2) When a magnet is brought near a piece of iron, the iron also gets attracted to the magnet, and it acquires the same ability to attract other pieces of iron.