4.TYPES OF MAGNETS-1.pptx

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1. TYPES, CLASSIFICATION AND PROPERTIES OF MAGNETS Submitted by: Bhoomika . B. V Ashwini Devi Sneha

2. Magnets are broadly divided into two groups, namely

3. Electromagnets

4. Electromagnets They are also used for separating iron scraps from other non-magnetic substances, as well as in amplifiers, armatures, bells, buzzers, circuit breakers, contact rectifiers, electronics, loud speakers, radios, storage devices, tele-communications, transformers etc. Surgeons use them for extracting iron splinters from eyeballs and other parts of the body.

5. Permanent Magnets

6. Different shapes, sizes, designs and strength Permanent magnets are made of different alloys and are of different shapes, sizes, and designs. These also have different magnetic strength. The Strength of the magnets depends upon the proportion, quantity and quality of the different metallic alloys which are mixed for making them. The sizes differ according to the requirements and the purposes for which they are made. Generally permanent magnets are made for industrial, commercial and educational purposes but some of them can be utilized for medical purposes also.

7. Classification of magnets according to shape

8. Classification of magnets according to shape 7. Arc or crescent magnets 8. U- shaped magnets 9. Horse-shoe magnets 10. Square magnets with holes or without holes 11. Cup shape covered magnets

9. Classification of Magnetic Materials

10. Physical properties of magnets

11. Ferromagnetic

12. Antiferromgnetism

13. Paramagnetic

14. Diamagnetic

15. Ceramic magnets

16. Advantages

17. Magnetic Permeability

18. Magnetic Field Magnetic field is the portion of space near a magnetic body or a current-carrying body in which the magnetic forces due to the body or current can be detected. They can be generated within the vicinity of a magnet, by an electric current, or a charging electrical field. They are dipolar in nature, which means that they have both a north and south magnetic pole. The standard international unit used to measure magnetic fields is the Telsa , while smaller magnetic fields are measured in terms of Guass ( 1 Telsa = 10000 Guass ).

19. Measurement of magnetic field