What are magnets for?

There are too many functions of magnets to count.

1, make a compass

Step 2 make a magnet

3, do electromagnetic relay

4. Generator

5. Engine

6. Speakers

7. Heat treatment

8. The vibration of nuclear magnetic resonance * * * can diagnose abnormal tissues of human body and judge diseases.

9. electric fan

10, magnetic therapy pillow, magnetic therapy belt

1 1. Iron remover made of magnet can remove iron powder that may exist in flour.

12, magnetized water can prevent boiler scaling.

13, magnetized seeds can increase crops to some extent.

14, magnetotherapy

15, rocks of different geological ages often have different magnetism. Therefore, we can judge the geological age change and crustal change according to the magnetism of rocks.

16, magnetic beneficiation

17, magnetic materials are also widely used in the military field. For example, ordinary mines or mines can only explode when they hit the target, so their functions are limited. If a magnetic sensor is installed on a mine or a mine, because the tank or warship is made of steel, when they approach (do not touch the target), the sensor can detect the change of the magnetic field, which makes the mine or mine explode and improves the lethality.

18. In modern wars, air superiority is one of the keys to winning the battle. However, the aircraft is easily found by enemy radar during flight, which is very dangerous. In order to avoid the surveillance of the enemy radar, a special magnetic material-absorbing material can be coated on the surface of the aircraft, which can absorb the electromagnetic waves emitted by the radar, so that the radar electromagnetic waves are rarely reflected, so that the enemy radar can not detect the radar echo, find the aircraft, and make the aircraft achieve the purpose of stealth. This is the famous "stealth plane". Stealth technology is a hot spot in the field of world military scientific research. The American F 1 17 stealth fighter is an example of the successful application of stealth technology.

19. In the "Star Wars" plan of the United States, a new weapon "electromagnetic weapons" was developed and studied. Traditional artillery uses the thrust generated by the instantaneous expansion of ammunition when it explodes to accelerate the projectile quickly and push it out of the bore. The electromagnetic gun puts the shell in the solenoid and energizes the solenoid, then the magnetic field generated by the solenoid will give a great impetus to the shell and shoot it out. This is the so-called electromagnetic gun. Similar to electromagnetic missiles.

Magnetic screwdriver (screwdriver, screwdriver)

Magnetic splicing toy

Magnetic hooks (often used in kitchens and bathrooms)

Some lights (fixed)

Relay controller (such as timer)

Speakers (headphones, telephone speakers, etc.). )

Generator (motor, etc.). )

compass

bank card

Stereo loudspeaker

And the gasket on the refrigerator door.

Screwdriver with replaceable head

Magnet button on whiteboard

There are many toys.

Putting a magnet in the kettle can also magnetize water.

Leather bag buckle

Clothes buckle

Pencil box cover

Gift box cover

door

electric bell

Rice cooker

Door maker

Magnetic plate

maglev train

TV

telephone