Advertisements
Advertisements
Question
State three differences between the temporary and permanent magnets.
Solution
Temporary magnet
- It is made up of soft iron.
- The magnet which loses its magnetism as soon as magnetising force is removed away from it.
- Because of its weak power, it is not used to make the iron pieces into the magnet.
Permanent magnets
- It is made up of steel, cobalt, and nickel.
- The magnet, which does not lose its magnetic properties easily is called a permanent magnet.
- It can convert an ordinary piece of iron into a temporary magnet.
APPEARS IN
RELATED QUESTIONS
Write true or false of the following statement.
Artificial magnets are weaker than the natural magnets.
Write true or false of the following statement.
Permanent magnets get easily demagnetised.
Fill in the blank.
Temporary magnets are usually made up of .................
Select the correct answer
Making a magnetic substance a magnet by bringing it closer to another magnet without touching it, is
Describe the method by which an iron bar can be made a magnet.
Tick the most appropriate answer.
A permanent magnet can be demagnetized by
Fill in the blank.
Permanent magnets are generally made of steel, cobalt, nickel, or an alloy called ...............
It was observed that a pencil sharpener gets attracted by both the poles of a magnet although its body is made of plastic. Name a material that might have been used to make some part of it.
Column I shows different positions in which one pole of a magnet is placed near that of the other. Column II indicates the resulting action between them for each situation. Fill in the blanks.
| Column I | Column II |
| N - N | ______ |
| N - ______ | Attraction |
| S - N | ______ |
| ______ - S | Repulsion |
You are given an iron strip. How will you make it into a magnet?
