Fun with Magnets Test - 1

Explanation:

Magnetic compass is used by sailors and navigators to know the direction in sea as it shows direction relative to the geographic poles as earth itself benhaves as  a huge mahnet.

Explanation:

Iron, nickel andcobalt are materials which get attracted towards a magnet and are called magnetic materials. The materials which are not attracted towards a magnet are called non-magnetic materials.

Explanation:

In electric bell, horse-shoe shaped electromagnet is used. When the current flows through the circuit, the electromagnet makes a magnetic field. The arm hits the gong, which makes a sound.

Explanation:

In any kind of a magnet, like poles repels and unlike poles attract. So the statement in option 1 is false.

Explanation:

To make an artificial magnets the material needs to be ferromagnetic. Hence special iron and steel alloys are used to magnetize. Also their retention capability is pretty high. 

Explanation:

Iron nail is made of iron which is a magnetic material because it gets attracted towards a magnet. The materials which are not attracted towards a magnet are called non-magnetic materials.

Explanation:

A horse-shoe magnet can be created by bending a bar magnet into a horse-shoe shape. This shape creates a strong magnetic field between the poles.It is one type of permanent magnet and the purpose of a horse-shoe magnet's shape is to place the poles as close as possible together.The total magnetic flux is the same, but the field is greater, as it is spread over a smaller volume.

Explanation:

Magnetic filed lines are closely packed at either pole of the magnet, widening as they get farther from the pole and connecting to the opposite pole of the magnet. The magnetic field gets weaker the farther you get from either pole. Hence magnetic strength is maximum at poles. 

Explanation:

It is said that, magnet was discovered by a shepherd named Magnes who lived in ancient Greece. One day he found that his stick which had a small piece of iron attached to one end was being attracted by rock.This rock was a natural magnet.This is how natural magnets was discovered.

Explanation:

Freely suspended bar magnet always comes to rest in a particular direction,which is the North-South direction.The end of the magnet that points towards the North is called its North seeking end or the North pole of the magnet. Similarly, the other end that points towards South is called its South seeking end or the South pole.