Question

3. How is magnetism of help in navigation?
4. What is the basic difference between the magnetic properties of iron and steel
5. State two ways in which a magnet can get demagnetised.
6. State one advantage of the shape of a horseshoe magnet.
Long-Answer Questions
1. What is a magnet? What is meant by (a) magnetic materials, and (b) magnetic fields?
2. Why is repulsion a surer test of magnetism than attraction?
3. What is magnetic induction? Describe in detail how a steel needle can be magnetised ​

Answer 1

Answer:

Earth's magnetic field does not move quickly or reverse often. Therefore, it can be a useful tool for helping people find their way around. For hundreds of years, people have used magnetic compasses to navigate using Earth's magnetic field. The magnetic needle of a compass lines up with Earth's magnetic poles.

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