Advertisements
Advertisements
Question
Describe two simple experiments to support the statement that magnetism is a property of the molecules of a magnet.
Solution
Magnetism is a property of molecules of a magnet.
Experiment-1: Take a bar magnet and break it into as small parts as possible. We shall find that each small part retain the original polarity i.e. even the smallest part of the magnet has its own north and south pole and can attract the magnetic substances.
It shows that, if it were possible to break a magnet into its molecules then each molecule would retain the property of a magnet.
Experiment-2: Take a soft iron bar. Place it in a magnetic field. We shall find that there is a small increase in its length on getting magnetized.
A soft iron bar becomes magnetized and gets lengthened only if each molecule of soft iron bar behaves as a magnet. Due to the setting of molecular magnets along straight chains, there is a slight increase in the length of soft iron bar. So we can say that magnetism is a property of molecules of a magnet.
APPEARS IN
RELATED QUESTIONS
How will you test whether a given rod is a magnet or not ?
Select the correct answer
An example of natural magnet is
What is a magnet?
Answer the following.
Why is it not possible to isolate a single magnetic pole?
If a bar magnet is hung by a thread tied at its center, its north pole becomes steady in the direction of the ______ Pole of the earth.
There is repulsion between the _____ poles of a magnet and attraction between its _____ poles.
Define the term Effective length of a magnet
Match the following.
| Magnetite | Magnetic lines |
| A tiny pivoted magnet | Natural magnet |
| Cobalt | Compass box |
| Closed curves | Ferromagnetic material |
| Bismuth | Diamagnetic material |
Define the terms magnet and magnetism.
