Question

What kind of magnet is used in a magnetic compass?
A) Electromagnet
B) Permanent magnet
C) Temporary magnet
D) None of the above

Answer 1

Hint
The work of Magnetic Compass is to navigate and point to the north of earth magnetic field, whereas it should always be aligned to the earth’s magnetic field. The earth magnetic field always acts on the compass and can be deflected by pushing the compass towards different magnets.

Complete Step By Step Solution
As we can see the statement, magnet in a compass used should be of which type. Do we need to work for a certain duration only No, so we need a type of Magnet? Which behaves infinitely with its Magnetic Property. So a temporary magnet cannot be the solution for the compass.
Secondly as we can see option (A), electromagnet, It has the property of Magnetic field produced by the Electric current connected from a source and that source can be exhausted. Which is not in Magnetic compass so option (A) is also incorrect. Now we can see how a permanent Magnet works.
They have a material where the magnetic field is generated by the internal structure of the material itself. No source, no exhaustion and endless time it retains its property.
Hence Compass uses the permanent Magnet.
Option (B) is the correct answer.

Note
The materials which are strongly attracted to magnet collect ferromagnetic or ferromagnetic, like iron, nickel , Cobalt and their Alloys of rare metals can be Magnetized Permanently by placing with permanent magnets. We need the earth 's magnetic field to always act upon the compass.