Question

What are the 7 types of magnets?

Answer 1

Hint: Magnets are substances that create an invisible attractive field around themselves. This field can attract other magnets and certain metals. There are various types of magnet classified on the basis of their nature and the retention of their magnetic properties.

Complete step by step solution:
The magnetic field of a magnet is concentrated around both of its ends. These ends are called poles. Types of magnets are classified on the basis of the retention of their magnetic properties. The 7 types of magnets are:
1. Temporary Magnets: These magnets get magnetised only in the presence of an external magnetic field created around them.

2. Electromagnets: They are created by running an electrical current through a coil with a metal core.

3. Alnico magnets:They are permanent magnets, often used in the making of microphones, sensors, engineering applications and travelling wave tubes.

4. Ceramic or ferrite magnets: They are permanent magnets, used in the creation of refrigerator magnets, loudspeakers and small electric motors.

5. Samarium cobalt (SmCo) magnets:Samarium cobalt magnets are permanent magnets. Because of their characteristics, they are most commonly used in applications which require high operating temperatures such as generators, pump couplings, sensors, motors, marine applications and in the aerospace, military and food and manufacturing industries.

6. Neodymium iron boron (NdFeB): Neo magnets can be found in a variety of applications including high performance motors, magnetic separation bearings, magnetic resonance imaging, sensors, switches and loudspeakers.

7. Superconductors: These are a type of electromagnets, made of wire coils of special metal alloys without a metal core. They are not resistant to electricity.

Note: Magnets produce a force at their poles, namely, North pole and South pole. A magnet, when left undisturbed, always aligns in the North-South direction. Various types of magnets exist in nature, Earth being the largest one. Beside this, artificial and temporary methods of evolving a magnet are also in use today.