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The needle of a compass always points in the Geographic North.This is because the earth is also a magnet that can interact with other magnets.The Earth's magnetic North Pole attracts the "north" ends of other magnets,it is technically the "South Pole "of our planet's magnetic field.

Compasses help people find their way when lost.

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Maglev trains operate without wheels as they 'float' above the track due to magnetic repulsion between electromagnets in the track and underside of the train.

Maglev trains can travel very fast, up to 480 km/h

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A horseshoe magnet is made of alnico,an iron alloy. The magnet,made in the shape of a horseshoe,has the 2 magnetic poles close together.

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Speakers have magnets in them. In order to translate an electrical signal into an audible sound, speakers contain an electromagnet: a metal coil which creates a magnetic field when an electric current flows through it. This coil behaves much like a normal(permanent) magnet with one particularly handy property: reversing the direction of the current in the coil flips the poles of the magnet. The electromagnet is attached to a cone made of a flexible material such as paper or plastic which amplifies these vibrations, pumping sound waves into the surrounding air and towards your ears.
1. Cone
2. Electromagnet (coil)
3.Permanent mag

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The stripe on the back of a credit card is a magnetic stripe. It is made up of tiny iron-based magnetic particles in a plastic-like film. Each particle is really a very tiny bar magnet about 20 millionths of an inch long. It is capable of storing data.

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The white stripe you see going around the back of your fridge door is a magnet.These magnets help to hold your fridge door to the body of the fridge.If there were no magnets on the back on the fridge door, the fridge will not be cold!

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The doors of a fridge makes use of magnetto keep it close.The unlike poles of the magnet will attract each other and keep the door close.

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There is a magnet at the back of the door to stop the
door from slamming. The magnets will attract each other as unlike poles are facing each other.

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The dark magnetic strip on the backside of a credit card stores data in much the same way as a computer’s hard drive does.

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A magnetic chess set . The magnet on the board will be attracted to the chess pieces ,so the magnet will help the chess pieces stay on the board and will not fall when it is being pushed.

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You can make a temporary magnet by using stroking method. To make it a temporary magnet you use a magnet and stroke the magnet on the item North or South. If you  have stroke it a few times you can then see it attract or repel an item. You can make it lose it magnetism by dropping it on the floor,hammer it and heat it over a flame.

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Magnets are used to power speakers in stereos,earphones and televisions. speakers and headphones work by vibrating thin air or membrane, to create sound waves in the air the membrane is moved by magnets, which respond to electrical signals from the music player.

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The electricity going through the coil generates a magnetic field which makes the coil vibrate as it is surrounded by magnets. As the coil is attached to a diaphragm, the vibration of the diaphragm makes the sound in the headphones for the user to hear

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South magnets only can attract to another South magnet.But if a South and North magnet meats , they will not attract !

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If you attach a bar magnet to a piece of wood and float it in a bowl of water, it will slowly turn and the magnet's North Pole will point towards the Earth's North Pole.

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the doors of a fridge makes use of magnets to keep it close

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Inside the vending machines, there are magnets that help to separate and sort out real coins from fake ones. These magnets can sort out metal disks or slugs from the real coin money. Paper money has magnetic dust in their ink. So vending machines check the money for its magnetism.

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A picture is shown:

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In order to separate aluminum cans (which magnets don’t stick to) from other, non-metallic trash, we could construct a conveyor belt that has a roller covered with magnets.

The magnets are arranged with alternating poles facing out, which provides a strong magnetic hold. The stuff that is not attracted to magnets just falls straight down.  The ferromagnetic bits that are attracted to magnets stay stuck to the conveyor belt a little longer, and are dropped a bit further back.

With strategic placement of a separating wall, this kind of setup can separate ferromagnetic materials like iron, nickel or steel from other materials, such as ore, waste, etc.

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A MRI (magnetic Resonance Imaging)is a method of scanning or taking pictures or images of different parts of the body using a large and strong magnet. It is widely used medical imaging technique.

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Animation of an Electric motor.

An electric motor is an electrical machine that converts electrical energy into mechanical energy. Most electric motors operate through the interaction between the motor's magnetic field and winding currents to generate force in the form of rotation. Electric motors can be powered by direct current (DC) sources, such as from batteries, motor vehicles or rectifiers, or by alternating current (AC) sources, such as a power grid, inverters or electrical generators. An electric generator is mechanically identical to an electric motor, but operates in the reverse direction, accepting mechanical energy (such as from flowing water) and converting this mechanical energy into electrical energy.

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Motors are made with magnets. Motors are used in many things such cars, toys,fan,printers and robots.

Here is a video showing how you can make your own motor using magnets, some wires and a battery.

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Computers use magnets to store   data on hard drives. Magnets alter the direction of a magnetic material on a hard disk in segments that then represent computer data.

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An electric doorbell uses an electromagnet (a temporary magnet whose magnetism can be turned on and off instantly by electricity) to make a more attractive sound, either with an electric bell, a buzzer, or chime bars struck by a magnetic hammer.

Most doorbells have what's called a "push-to-make" switch outside the door.  When you prod the button, your finger pushes two electric contacts together to close the circuit; when you release the pressure, a spring moves the button back out again so the circuit is opened.  The circuit itself contains only two basic elements: a battery and something that makes a noise, which is often an electric bell: a little metal bell and a clapper powered by an electromagnet. When someone presses the button, the electromagnet is activated and pulls on the clapper, which strikes the bell. The clapper is actually also part of the circuit. When it flips out to strike the bell, it breaks the circuit at the same time, cutting the power to the electromagnet. A spring attached to the clapper pulls it back to its original position, whereupon it completes the circuit, energizes the electromagnet, and rings the bell once more. This goes on until the batteries run out.

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Farmers use magnets to catch pieces of metal that cows eat out in the field. The cow swallows the magnet with its food; as it moves through the animal’s digestive system it traps metal fragments.

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Only four types of metals can be
attracted by magnets. They are Iron, Steel, Cobalt and Nickel.
Magnets can be used on spectacles. My spectacles frame has a magnet to hold the sunglass clip-on to the frame.

Magnets are used to make a tight seal on the doors to refrigerators and freezers.

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Earth, Saturn, Jupiter, Neptune, and Uranus are the only planets in our solar system with magnetic fields. If we didn't have a strong magnetic field, our planet would overheat, the oceans would evaporate, and life on Earth would be destroyed. Other places like the moon and Mars don't have strong magnetic fields, and this is one reason they don't have oceans.

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Magnets are found in some commonly used medical equipment such as and Magnetic Resonance Imaging machines. MRIs use powerful magnetic fields to generate a radar-like radio signal from inside the body, using the signal to create a clear, detailed picture of bones, organs and other tissue. An MRI magnet is very strong – thousands of times more powerful than common kitchen magnets. Another medical use for magnets is for treating cancer. A doctor injects a magnetically-sensitive fluid into the cancer area and uses a powerful magnet to generate heat in the body. The heat kills the cancer cells without harming healthy organs.

https://www.radiologyinfo.org/en/info.cfm?pg=bodymr

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A crane uses a gigantic magnet to lift magnetic objects in the scrap yards to turn them into other magnetic uses

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An electromagnetic lock, magnetic lock, or maglock is a locking device that consists an electromagnet and an armature plate. There are two main types of electric locking devices. Locking devices can be either "fail safe" or "fail secure". A fail-secure locking device remains locked when power is lost. Fail-safe locking devices are unlocked when de-energized. Direct pull electromagnetic locks are inherently fail-safe. Typically the electromagnet portion of the lock is attached to the door frame and a mating armature plate is attached to the door. The two components are in contact when the door is closed. When the electromagnet is energized, a current passing through the electromagnet creates a magnetic flux that causes the armature plate to attract to the electromagnet, creating a locking action. Because the mating area of the electromagnet and armature is relatively large, the force created by the magnetic flux is strong enough to keep the door locked even under stress.

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An MRI (Magnetic Resonance Imaging) machine uses a combination of magnetic fields and radio waves to look at the hydrogen atoms in our bodies. The magnetic field causes the hydrogen atoms to act like small magnets and then radio waves are sent in, which bounce back, giving us a signal we can measure.

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Dr Richard Watts from the Department of Physics and Astronomy at the University of Canterbury talks about how an MRI (magnetic resonance imaging) machine works. An MRI machine uses a combination of magnetic fields and radio waves to look at the hydrogen atoms in our bodies.

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vacuum cleaner has an electric motor that runs by magnetism. Inside the motor, wire coils produce repelling forces when electric current flows through them. The forces make the motor spin. Unlike refrigerator magnets, which use no power, the magnetic coils in the motor have no magnetism when the vacuum cleaner is turned off. The coils have much stronger magnetism than the magnets you stick on your fridge door.

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Home audio Speakers
contain magnets.The speaker consists of a stationary  magnet in the metal frame,a paper diaphragm and a wire coil molded into the diaphragm’s center.a paper diaphragm and a wire coil molded into the diaphragm’s center.

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A one person maglev car by Tyco and Gakken,the maglev system suspends 2-3 centimetres above the track ,propelling the rider forward without friction.The fastest record for a full-blown maglev train is 361mph.

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MRI uses a magnetic field and radio waves to create detailed pictures of the body's insides. Unlike CAT scans or X-rays, MRI doesn't use radiation. An MRI scanner is a large doughnut-shaped magnet that often has a tunnel in the center.

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Magnets can be used for educational toys for kids. Kids can learn to be creative using magnetic building blocks like the ones in the picture below. They can also teach kids how magnets work.

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Magnets are used to make a tight seal of the doors to refrigerators and freezers.

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https://www.youtube.com/watch?v=hYTH6wdI-us
These are magnetic metal balls that attract to each other when they are close .  Metal balls are useful to put as decoration and can play with it to make it as anything , Examples : a bike and shapes and many more.