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You can turn electromagnets on and off.
Ambrose Krajcik
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Why do cranes use electromagnets instead of permanent magnets?
Electromagnets are stronger and weigh far less than permanent magnets.
What is one advantage of using electromagnets instead of permanent magnets?
Electromagnets can be turned off and off
What are three types of magnets?
They are permanent, temporary and electromagnets
Why are electromagnets used in so many electronic devices?
Because they are magnets and electronics stick to magnets
How are magnets and electromagnets the same?
both can attract the ferromagnetic substances........
How are magnets alike and How are magnets different?
My answer id they have different shapes and colors.
Why do cranes use electromagnets instead of permanent magnets?
Electromagnets are stronger and weigh far less than permanent magnets.
What do magnets attract that electromagnets do not?
Nothing, elctro magnets act just the same as permanent magnets
Are electromagnetic magnets permanent?
No, electromagnets are not permanent.
A permanent magnet can affect?
A permanent magnet can affect magnets and electromagnets.
What are the types of magnets?
Ferro-magnets, permanent magnets, temporary magnets, and electromagnets. Ferro-magnets are magnets that are magnetic at a higher temperature than room temperature. do not quote me on that. permanent magnets are magnets that are always magnets, they are the kinds you use a lot. Temporary magnets are things that are magnetic in an extrenal magnetic field. Last but not least, electromagnets. Electromagnets are coils of wire around a cobalt, nickel, or iron. When ou run electricity through the wire, the core and wire become magnetic.
What is one advantage of using electromagnets instead of permanent magnets?
Electromagnets can be turned off and off
What types of magnets are used in a MRI machine?
Electromagnets
Can electromagnets be stronger then permanent magnets?
Yes (and often are).
Are Magnets and electromagnets are used in many devices?
yes
What are three types of magnets?
They are permanent, temporary and electromagnets
What has the author T B Montgomery written?
T. B. Montgomery has written: 'Design of magnets and electromagnets' -- subject(s): Magnetism, Electromagnets, Magnets, Magnetic devices
