Question

Give the composition of magnetic compass
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Answer 1

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• The needle of a magnetic compass must be made of a metallic substance, which can be magnetized for an extended period of time.

• The most common substance used for compass needles is steel.

• Steel is an alloy of iron and a small amount of carbon.

Answer 2

Background

A compass is a device used to determine direction on the surface of the earth. The most familiar type of compass is the magnetic compass, which relies on the fact that a magnetic object tends to align itself with Earth's magnetic field. Other types of compasses determine direction by using the position of the Sun or a star, or by relying on the fact that a rapidly spinning object (a gyroscope) tends to resist being turned away from the direction in which its axis is pointing.