what are magnets used for? Homework question?

Answer 1

To create an electrical current, and to affix nice pictures and notes to refigerators.

Answer 2

Common uses of magnets in everyday life are:
In a fridge to shut the door, at the scrap yard to pick up metal and in a compass.
You can make your own magnet by wrapping a wire around a piece of metal and passing a current through it.

Answer 3

Magnets are used to produce electricity! Used in Alternators in cars, trucks, bikes, ships and power stations throughout the country!

Answer 4

Magnetic recording media: Common VHS tapes contain a reel of magnetic tape. The information that makes up the video and sound is encoded on the magnetic coating on the tape. Common audio cassettes also rely on magnetic tape. Similarly, in computers, floppy disks and hard disks record data on a thin magnetic coating.
Credit, debit, and ATM cards: All of these cards have a magnetic strip on one of their sides. This strip contains the necessary information to contact an individual's financial institution and connect with their account(s).
Common televisions and computer monitors: The majority of TV's and computer screens rely in part on an electromagnet to generate an image--see the article on cathode ray tubes for more information. Plasma screens and LCDs rely on different technology entirely.
Loudspeakers and microphones: Loudspeakers actually rely on a combination of a permanent magnet and an electromagnet. A speaker is fundamentally a device to convert electric energy (the signal) into mechanical energy (the sound). The electromagnet carries the signal, which generates a changing magnetic field that pushes and pulls on the field generated by the permanent magnet. This pushing and pulling moves the cone, which creates sound. Not all speakers rely on this technology, but the vast majority do. Standard microphones are based upon the same concept, but run in reverse. A microphone has a cone or membrane attached to a coil of wire. The coil rests inside a specially shaped magnet. When sound vibrates the membrane, the coil is vibrated as well. As the coil moves through the magnetic field, a voltage is generated in the coil (see Lenz's Law). This voltage in the wire is now an electric signal that is representative of the original sound.
Electric motors and generators: Some electric motors (much like loudspeakers) rely upon a combination of an electromagnet and a permanent magnet, and much like loudspeakers, they convert electric energy into mechanical energy. A generator is the reverse: it converts mechanical energy into electric energy.
Transformers: Transformers are devices that transfer electric energy between two windings that are electrically isolated but are linked magnetically.
Chucks: Chucks are used in the metalworking field to hold objects. If these objects can be held securely with a magnet then a permanent or electromagnetic chuck may be used. Magnets are also used in other types of fastening devices, such as the magnetic base, the magnetic clamp and the refrigerator magnet.
Magic: Naturally magnetic Lodestones as well as iron magnets are used in conjunction with fine iron grains (called "magnetic sand") in the practice of the African-American folk magic known as hoodoo. The stones are symbolically linked to people's names and ritually sprinkled with magnetic sand to reveal the magnetic field. One stone may be utilized to bring desired things to a person; a pair of stones may be manipulated to bring two people closer together in love.
Art: 30 millimetre or thicker vinyl magnet sheets may attached to paintings, photographs, and other ornamental articles, allowing them to be stuck to refrigerators and other metal surfaces.

Answer 5

One clever use for magnets is for separating ferrous metals from non ferrous ones. Typically, in recycling plants, an electromagnet is suspended over a conveyor & a mixture of metals passes beneath it. This recyclable metal is mostly composed of steel & aluminium cans. The steel cans are attracted & stick to the magnet, & the aluminium cans pass on to the next stage of recycling.

Answer 6

Gravitational pull and they are a force called magnetism

Answer 7

Electrical generators,
Electric motors
Loud speakers
Keeping fridge doors closed

Answer 8

All sorts.

Decorating your fridge.
In electric guitar pickups.
Speaker cones.
Switches.
Fan and other motors.
London Underground service update boards.

There's millions of uses, but they're all you're getting out of me.

Answer 9

Sticking pretty pics on the fridge

Answer 10

Picking up the car with the body in the boot, and dropping it into the crusher.