Magnets are often used in industry and manufacturing. They are used to hold tools and dies in place, to lift heavy objects, and to move materials through conveyor belts. Magnets are also used in scientific equipment, such as particle accelerators and MRI machines.
Magnets are used in magnetic compass, doorbells, refrigerators
A magnet is a material or object that produces a magnetic field. This magnetic field is invisible but is responsible for the most notable property of a magnet: a force that pulls on other materials, such as iron, and attracts or repels them. Magnets are only attracted to a few ‘ferromagnetic’ materials like iron and cobalt and their alloys.
The earliest known magnets were lodestone s, naturally magnetized pieces of the mineral magnetite. They were used in compasses for navigation by the 11 t h century Chinese and the Vikings around 1200 AD. The word “magnet” comes from the Greek term μαγνήτης λίθος (magnētēs lithos) meaning “stone from Magnesia”, an area in modern-day Greece where lodestone s were found. Permanent magnets are made from certain materials, such as iron, nickel, cobalt and their alloys, that have been exposed to an intense magnetic field created by electric currents in coils of wire.
An everyday example of a temporary magnet is a paper clip that has been picked up by a refrigerator magnet. Usually made of steel or iron, paper clips are slightly ferromagnetic; when they are within the magnetic field produced by the fridge magnet they become temporarily Magnetized themselves. Theorist Hanneke Casimir discovered in 1948 that even non-magnetic materials like gold can be attracted to very strong magnets such as those used in MRI machines. This happens because when electrons spin around an atom’s nucleus they create tiny current loops called electron spin currents. When placed close enough to another material these currents can interact with each other causing one material to be pulled towards another – even if it’s not normally attracted to magnets!.
Some animals can also sense Earth’s magnetic field and use it for navigation; this ability is called biomagnetism. Magnetoreception (the ability to detect magnetic fields) enables birds migrate north-south along Earth’s continents following invisible lines of force generated by our planet’s dipole moment.”Pigeons orient themselves along Earth’s north-south axis during migration” using something called crypto chrome which acts like tiny compass needles inside their cells’ photoreceptors detecting changes in light intensity caused by Earth’s rotation..
Magnets are used in dynamos, motors, loudspeakers, microphones, etc
Dynamos and Motors
The first use of magnets is in dynamos and motors. A dynamo is a machine that converts mechanical energy into electricity, while a motor does the reverse, converting electricity into mechanical energy. In both cases, magnets are used to create movement.
In a dynamo, magnets are used to spin a turbine which generates electricity. In a motor, electricity is used to spin a magnet which creates movement. Magnets are also used in electric vehicles, such as trains and cars. The magnets in the motors help to move the wheels forwards or backwards.
Loudspeakers and Microphones
Another common use for magnets is in speakers and microphones. Magnets are used to create vibrations in speaker cones which produce sound waves. The microphone uses a magnet to convert sound waves into electrical signals which can be amplified. This is how our voices are heard on the radio or telephone.
Ceramic magnets are used in computers
Ceramic magnets are used in a variety of applications, including computers. Ceramic magnets are made from a combination of iron oxide and rare earth metals. They are electrically conductive, which makes them ideal for use in computer hard drives. Ceramic magnets are also used in speakers and microphones.
Magnets are used in toys to give magic effects
Magnets are used in many toys to create magical effects. For example, a simple magnet can be used to make a toy car move on its own. By attaching a magnet to the bottom of the car and placing it on a track made of metal, the car will be pulled along by the magnet. This is because magnets have a property called magnetic force, which is the force that allows them to attract or repel other objects.
Magnetic force is created by the movement of electrons within atoms. Electrons are tiny particles that orbit around the nucleus of an atom. When they move, they create a magnetic field. This magnetic field is what we feel when we put two magnets together and experience either a force of attraction or repulsion. The strength of this force depends on how close together the magnets are and how strong their magnetic fields are.
Some materials like iron have atoms with electrons that can be easily moved around by external magnetic fields. This makes them attracted to magnets and is why your toy car was pulled along by the magnet when you placed it on the track.