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Not necessarily. The key difference between a permanent magnet and an electromagnet is the a permanent magnet does not change whereas an electromagnet's magnetic feild can be altered by varying the current through it. This means that electromagnets are more useful because they can be turned on or off, turned up or down or be put in 'reverse'.
Wiki User
∙ 14y ago
Wiki User
∙ 14y agoYes. Permanent magnets are limited in their field strength by their size and by the purity of the metals. Electromagnets can use high currents and even super-conducting materials to create extremely powerful fields.
It should be noted that the Earth itself generates a very large magnetic field, but not a strong one. Any small magnet can overpower it at close distances.
Vanessa Jasmine
electromagnets can be turned on and off by controlling the current
Wiki User
∙ 13y agoBecause electromagnets are way stronger than the permanent magnets even thought they dont last as long as the permanent magnets
Wiki User
∙ 12y agothat depends on how powerful the power source of the electric magnet is
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When would you want to use an electromagnet rather than a permanent magnet?
When you need a magnet you can turn on and off an electromagnet is used.
Why would electromagnet be used in a recycling yard rather than a strong permanent magnet?
Because with an electromagnet, you can turn it off and on - you can pick things up with it then drop them again.
Advantage of using electromagnet in an electric motor rather than a permanent magnet?
convert electrical energy to energy of motion...! the usage of an electromagnet allows us to control the flow of electrons to the electric rotor,thereby allowing us to control the working of the rotor,whereas with a permanent magnet there will be a continuous supply of energy which can be stopped only if the magnet is damaged or heated.
Is a hot magnet stronger than a cold magnet?
There's no relationship there. But if you take any permanent magnet and heat it hot enough, it loses some or all of its magnetism.
What does electromagnets do?
It is the joining of electricity and magnetic field, it is the study if the interaction between the two.
Why will an electromagnet be able to pick up more steel cans than a permanent magnet?
An electromagnet is a stronger magnet.
When would you want to use an electromagnet rather than a permanent magnet?
When you need a magnet you can turn on and off an electromagnet is used.
How is an electromagnet different a bar magnet?
a electromagnet is bigger than a bar magnet
Why would electromagnet be used in a recycling yard rather than a strong permanent magnet?
Because with an electromagnet, you can turn it off and on - you can pick things up with it then drop them again.
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.
Advantage of using electromagnet in an electric motor rather than a permanent magnet?
convert electrical energy to energy of motion...! the usage of an electromagnet allows us to control the flow of electrons to the electric rotor,thereby allowing us to control the working of the rotor,whereas with a permanent magnet there will be a continuous supply of energy which can be stopped only if the magnet is damaged or heated.
Is a hot magnet stronger than a cold magnet?
There's no relationship there. But if you take any permanent magnet and heat it hot enough, it loses some or all of its magnetism.
What are statement that are true of magnets?
A magnet always has two poles.They have a magnetic field.Electromagnets can be made much stronger than permanent magnets.A magnet always has two poles.
What does electromagnets do?
It is the joining of electricity and magnetic field, it is the study if the interaction between the two.
Why is an electromagnet better that a bar magnet?
Electromagnets can have higher "domain currents" than permanent magnets, and have no non-aligned nor anti-aligned domains like permanent magnets tend to have (or get over time).
How would you make a magnet strong?
For an electromagnet, increasing either the current or the number of turns of wire will generate a stronger field. For a permanent magnet, the strength is limited by what it's made of. Some materials make better magnets than others. This is a topic in the fields of ceramic engineering and metallurgy, and can't be answered in a simple one-paragraph blurb.
What are some statements that are true of magnets?
A magnet always has two poles.They have a magnetic field.Electromagnets can be made much stronger than permanent magnets.A magnet always has two poles.
