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An electromagnet can be turned on and off, with an electric current and a magnet can not turn off

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13y ago

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Which magnets can retain their property for a short period of time?

Electro-magnets


Do magnets repel non magnetic materials not including electro-magnets?

of course not.


How are solendoids related to electro magnets?

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Why are magnets used?

Electro magnets can be very useful to carry heavy loads of iron and metal from one side of a factory to another. Electro-magnets are formed by shooting electricity through a coil of copper.


Are bar magnets stronger than electro magnets?

Yes, because electromagnets can lose their magnetism.


Are electro magnets sometimes called artificial magnets?

Yes, electromagnets itself is an artificial magnet.


How are electro magnet different from permanent magnet?

Electro magnets differs from permanent magnet because it requires electricity. A simple electro magnet consists of an iron rod wrapped in a coil of copper and when electricity flows through the copper, a magnetic field is formed.


What supply should be given for making electro magnets... ac or dc?

For a simple electro-magnet use a DC supply.


What has electro magnets in them?

Lots of things do. For example, relays. (The electronical component)


What is an example of a situation where it would be best to use certain types of magnets to attract different types of objects?

Electro magnets can be used to attract metals temperarily while permanent magnet would be used for compasses.


What uses an electromagnet?

A loud speaker can use electro magnets and i hope this helps =)


What are electro magnets used in?

car wreck (scrapyards) metel dedectors at airports