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Electromagnet which uses electric current can be turned on and off.
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∙ 9y ago
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What are electromagents?
Magnets that are turned on by passing an electric current through them, and turned off by not allowing an electric current through them.
Why are electromagnets used instead of a permanent one?
sometimes in magnetic sepration etc electromagnets are more useful than permanent one as first magnet is used to seprate metallic waste and then its turned off so that attracted waste falls off at desired place so here permanent magnets are not that use full as electromagnet as in permanent magnet waste would get attracted but it would not fall. so electromagnet is more useful than permanent one.
Which magnetic material can retain permanent magnetization?
False permanent magnets can but electromagnets need a running current A+
Objects that keep their magnetic properties for a long time?
A permanent magnet (in contrast to an electromagnet).
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 can you use your statemennt for?
Permanent magnets can be turned off.
What is one advantage of using electromagnets instead of permanent magnets?
Electromagnets can be turned off and off
Is electromagnets are natural magnets?
The magnetism of an electromagnet is natural (it comes out of the laws of physics), but the magnetism disappears when the electricity is turned off - it is not a permanent magnetism.
What is the difference between permanent magnets and temporary magnets?
One is temporary, the other is more or less permanent.
What is a magnet that can be turned on and off called?
Electromagnets have an electric current running through them that enables there conductive power to be strengthened. However, a magnets full conductive power can never be "turned off/on".
How are electro magnets different from other magnets?
An electromagnet can be turned on and off, with an electric current and a magnet can not turn off
Can magnets be turned off?
search this on youtube, there is a video of how to turn off a permanent magnet. they use some wire wrapped around it in a certain position and then put 180 khz of electricity through it
Does permanent magnets have pulling capacity?
Yes, and they can be quite powerful at doing this. The bad thing is that they can be hard to release from the item you are pulling if you can't turn them off "Permanent magnets".
What types of magnets are harder to magnetize but retain magnetism much longer?
permanent magnets
What is true of permanent magnets?
Permanent magnets contain a current-carrying wire.
Are permanent magnets only attracted to other permanent magnets?
No, they are attracted to: Other permanent magnets Solenoids Iron Wires with current running through them
What are the advantages of electromagnets against normal magnets?
Electromagnets' magnetism can be manipulated. Electromagnets can be magnetised and demagnetised by passing electric current. Therefore they are used in motors- which works when the coil is magnetised by passing an electric current. It is also used for cranes.
