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It is a steel core with many wraps of fine wire around it. When a DC voltage is applied to each end of the wire to form a circuit the steel core becomes magnetized On application of the voltage, one end of the steel become the north pole and the other end of the steel becomes the south. Reverse the polarity of the DC voltage and the north south poles of the steel also change from end to end.
Wiki User
∙ 15y ago
Wiki User
∙ 13y agothe electro magnet is used to lift metal such as bolt or such also to lift like cars in junkyards that is what there for
Wiki User
∙ 14y agoElectromagnets are magnets powered by an electric current. They can be used to move objects and also store information.
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What common alloy is used to make magnets?
Iron is used for electromagnets.
How do electromagnets find uses in a vending machine?
Electromagnets are used in vending machines to deciever real coins from fake ones. Electromagnets will sort counterfeit money from real money, because most counterfeit money is an iron alloy. Iron is magnetic and gets pulled by the electromagnet, while real coins are not effected.
Where is the electromagnet the strongest?
The strongest type of electromagnets are superconducting electromagnets. Usually these superconducting electromagnets are immersed in liquid nitrogen or liquid helium to cool them to near absolute zero. === === For non-superconducting electromagnets, the strongest electromagnets would have the greatest ampere turns over a large area. The core of the magnet would be a highly ferromagnetic material, such as iron, or a mixture of a ferrite and a ceramic. Very strong electromagnets used for lifting machinery have both poles on the bottom side which will maximize the magnetic field produced. Non-superconducting electromagnets will saturate and stop producing magnetic fields at about 2 teslas or so. This is the limit of magnetic strength of ordinary electromagnets.
Why was Joule so interested in electromagnets?
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Permanent magnets and electromagnets both hold their magnetism for a long period?
the answer is false Permanent magnets will hold their magnetism for a long period of time. Electromagnets will only remain magnetic as long as current is flowing through them.
What are the electromagnets called that are used at junkyards?
The electromagnets that are used in junkyards are called just that, electromagnets. They are used to sort out different types of metals.
Where use electromagnets?
Inside of electric motors are electromagnets and permanent magnets. In a metal junk yard large electromagnets are used to pick up metal. In MRI's large electromagnets are used for imaging.
Where are electromagnets used in the home?
Electromagnets are used in many things such as in televisions, blenders, doorbells, and speakers
Why are electromagnets used in many electronics?
Electromagnets are used in many electronic devices because they can be used to lift very heavy objects. They are also in machines doctors and scientists use everyday. As you can see, electromagnets are used in many different ways!
Are electromagnets used in i-pods?
yes
How are electromagnets used in hard drives?
electromagnets are used to scan it and read the data.the HD has tiny magnetic imprints, which are read by the electro magnet
How are electromagnets used to make electric power?
Electromagnets are used to make electric power because magnets are a type of electricity,and electro is at the front.
What is used to focus an electron microscope?
Electromagnets.
Can electromagnets be used for security systems?
Yes.
What industry use electromagnets?
Since electromagnets are used in most large electric motors,the answer is almost all industry.
How are electromagnet usful?
Electromagnets are used in many ways. Televisions use electromagnets to direct the electron beam, whereas loudspeakers and earphones use electromagnets to push the diaphragm forwards.
What types of magnets are used in a MRI machine?
Electromagnets
