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Depends on the size. One good example of a powerful electromagnet is the one used to lift cars at junk yards. Permanent magnets are not used for that due to the sheer power needed to lift cars. Also, electromagnets can be turned ON and OFF making them useful in picking up and then dropping the junk cars as needed.
Another big example of electromagnets are the ones used on power generators to generate electric power.
What else can I help you with?
Are electromagnets stronger or weaker than permanent magnets?
Electromagnets can be stronger than permanent magnets because the strength of an electromagnet can be adjusted by changing the amount of electric current flowing through its coil. On the other hand, permanent magnets have a fixed magnetic field strength determined by the material they are made from.
How are temporary magnets different from permanent magnets?
They are temporary, they can only attract for a few seconds, as permanent magnets can attract for as long it is needed.AnswerA permanent magnet is a material which retains its magnetism once any external magnetising force has been removed. For example, when the current passing though a coil wound around that material is switched off. Permanent magnets are used in certain measuring instruments, such as moving-coil instruments, fridge magnets, etc.A temporary magnet is a material which retains its magnetism providing any external magnetising force continues to be applied. For example, when the current passing though a coil wound around that material flows, it will continue to act as a magnet, but once the current is turned off it will lose that magnetism (or most of it!). Temporary magnets are used to manufacture relays, transformer cores, etc.
When is a magnet field stronger when is it weaker?
A magnetic field is stronger when the magnets are closer together, and weaker when they are farther apart. The strength of a magnetic field also depends on the material the magnets are made of and their physical size.
Is magnet a good conductor of heat?
Depends on what it's made of and how much heat. There's something called the "Curie point", which is different for every material, and above the Curie temperature permanent magnets lose the alignment of magnetic moments that makes them permanent magnets. They may spontaneously realign if cooled, but the magnet will likely be weaker than it was originally. Curie temperatures for common magnets are generally fairly high (at least several hundred degrees).
Why do strong magnets attract both poles of weaker magnets?
coz if you try to attract a weak and a weak side it wont stick. same with the strong and strong side. But if you put a strong side next to a weak side it will attach. When a strong magnet is brought nearby the domains line up more closely with the magnetic field. The result of this reorientation is an overall magnetization of the weaker magnet.
Are electromagnets stronger or weaker than permanent magnets?
Electromagnets can be stronger than permanent magnets because the strength of an electromagnet can be adjusted by changing the amount of electric current flowing through its coil. On the other hand, permanent magnets have a fixed magnetic field strength determined by the material they are made from.
Are electromagnets weaker than permanets magnets?
Not necessarily. electromagnets can be extremely powerful, capable of lifting tons of metal.
Advantages and disadvantages of electromagnets?
There are many reasons why electromagnets shouldn't be used. For example, permanent magnets are better to use economically because there is no cost of operation, like an electromagnet. There is also no maintenance or hardly any setup required. For permanent magnets, they can be used for a lot longer than electromagnets becausecan be used in hazardous places and are they are unaffected by shock or vibrations. Electromagnets require electricity to run, which costs money. They also burnout or lose its magnetism after a while. There are also many reasons why electromagnets should be used. For an electromagnet, a person could easily control the power of the magnetism, unlike the permanent magnet which has the same intensity throughout. A person could also turn the power of the magnet on and off, which can become useful in certain situations. An electromagnet can also be made stronger than permanent magnets. The electromagnet also has a good field of depth, unlike the permanent magnets limited field depth.
How are temporary magnets different from permanent magnets?
They are temporary, they can only attract for a few seconds, as permanent magnets can attract for as long it is needed.AnswerA permanent magnet is a material which retains its magnetism once any external magnetising force has been removed. For example, when the current passing though a coil wound around that material is switched off. Permanent magnets are used in certain measuring instruments, such as moving-coil instruments, fridge magnets, etc.A temporary magnet is a material which retains its magnetism providing any external magnetising force continues to be applied. For example, when the current passing though a coil wound around that material flows, it will continue to act as a magnet, but once the current is turned off it will lose that magnetism (or most of it!). Temporary magnets are used to manufacture relays, transformer cores, etc.
Does the energy that Magnets produce ever run out?
Yes magnets get weaker over time.
When is a magnet field stronger when is it weaker?
A magnetic field is stronger when the magnets are closer together, and weaker when they are farther apart. The strength of a magnetic field also depends on the material the magnets are made of and their physical size.
Is magnet a good conductor of heat?
Depends on what it's made of and how much heat. There's something called the "Curie point", which is different for every material, and above the Curie temperature permanent magnets lose the alignment of magnetic moments that makes them permanent magnets. They may spontaneously realign if cooled, but the magnet will likely be weaker than it was originally. Curie temperatures for common magnets are generally fairly high (at least several hundred degrees).
What happens to magnets when they are heated?
it will lose its magnetism OR it will get weaker
What distance from each other are two magnets before they repel to each other?
At any distance. The strength of the repulsion increases with proximity and it is inversely proportional to the square of distance between them i.e. if you double the distance the force is 1/4th
Why do strong magnets attract both poles of weaker magnets?
coz if you try to attract a weak and a weak side it wont stick. same with the strong and strong side. But if you put a strong side next to a weak side it will attach. When a strong magnet is brought nearby the domains line up more closely with the magnetic field. The result of this reorientation is an overall magnetization of the weaker magnet.
How do magnets get weaker over time?
Magnets can get weaker over time due to factors such as exposure to heat, physical damage, and being dropped or banged against hard surfaces. These actions can disrupt the alignment of the magnetic domains within the material, causing the magnet to lose its strength.
Does temp affect magnets?
Yes, temperature can affect the magnetic properties of a magnet. In general, magnets become weaker at higher temperatures and stronger at lower temperatures. Extreme temperatures can also cause permanent damage to the magnet's magnetic properties.
