Physics
Match the following columns :
| Column A | Column B | ||
|---|---|---|---|
| (a) | Steel | (i) | to store magnets |
| (b) | Soft iron | (ii) | temporary magnet |
| (c) | Used in electric bell | (iii) | permanent magnet |
| (d) | Magnetic keepers | (iv) | electromagnet |
Related Questions
Fill in the blanks :
(a) Temporary magnets are usually made up of …………… .
(b) Rough handling destroys the …………… properties of a magnet.
(c) Like poles …………… each other.
(d) A freely suspended magnet points in the …………… direction.
(e) In a magnet, …………… have the maximum attractive property.
(f) A magnet has …………… poles.
Write true or false for each statement.
(a) Artificial magnets are weaker than natural magnets.
(b) Poles of a magnet cannot be separated.
(c) A magnet can attract only a magnetic substance.
(d) A magnet has no effect when it is heated to a high temperature.
(e) Permanent magnets get easily demagnetised.
(f) Magnetic poles occur in pairs.
(g) Single touch method is better than the electrical method for making a magnet.
(h) Magnetic keeper is a wooden piece.
(i) Copper cannot be magnetised.
What is a magnet?
What are magnetic and non-magnetic substances? Give two examples of each.