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Magnetism and Electromagnetism Research Project
Heinrich Hertz!
Heinrich Hertz: Heinrich has been one of the main contributors in electromagnetism.
He started doing experiments with electromagnetic waves going through loops of metal wire, eventually he found out that electromagnetic waves and light waves were identical.
He found out the unit of measurement for these waves and named them “Hertz”
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Maglev Train
A maglev (magnetic levitation) train works without wheels and is propelled by electromagnetic forces. This type of train usually consists of a set of magnets along the bottom of the train and a series of electromagnets on the tracks or guide-way for the train. The electromagnets are adjusted to have the same polarity as the train's magnets, though complex computer controls. Since the magnetic poles repel, the train is levitated or floats slightly above the track. Guides on the sides prevent the train from sliding off. Depending on the position of the train, the polarity of the electromagnets is adjusted, causing the train to move forward. Maglev trains can reach speeds over 260 mile per hour or 430
Loud Speaker
The loudspeakers in your radio, TV or stereo system use varying electric current through an electromagnet to create sound. The electric current varies at a fast rate, causing the strength of the magnetic field to vary. This results in moving the loudspeaker membrane or cone back and forth rapidly, resulting in sound and even music.
Electromagnetic Lock
An electromagnetic lock be used to lock a door by creating a strong field in an electromagnet that is in contact with a magnetic plate. As long as there is current through the electromagnet, the door remains closed and locked. Another type of electromagnetic lock uses an electromagnet to extend a plunger between the doors, making it nearly impossible to open the door until the electromagnet releases the plunger.
Hair Dryer
A hair dryer uses electricity. The electricity drives a fan motor, and that's applied electromagnetic-ism. The electricity is also used to drive a resistance heating wire. Electromagnetic energy heats the wire alloy and causes it to give off that heat to the air that is passing through it.
Electric Motor
An electric motor is another application of electromagnets. Suppose you put some electromagnets on a wheel and put some permanent magnets around the wheel. The electromagnets could be made to attract and repel the surrounding magnets, causing the wheel to turn. By varying the current, the speed of the motor can be made to vary. Look at an electric motor and see the internal wheel made of electromagnets and the outer shell made of permanent magnetic material.
Doorbell Ringer
An old-fashioned doorbell used an electromagnet that was rapidly turned on and off to pull a clangor against a bell.
Electromagnetic Induction
This is the production of a potential difference across a conductor when it is exposed to a varying magnetic field.
This property allows mechanical energy to be converted to electrical energy and vise versa. Motors consume electrical energy and convert that to produce mechanical energy.
Electromagnets and Magnets Store
Chandler McAdoo
Website: http://easybib.com/key/8f72bf