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Most materials which exhibit a spontaneous magnetisation (ie a lump of it can act as a magnet without you doing anything) lose this property above a certain temperature. However, if you're reasonably far below this temperature, as iron is at room temperature, making it colder probably won't make much difference (though at extremely low temperatures all kinds of odd thing can happen).
The most powerful magnetic fields used at the moment though are not generated by a magnetic material, but by running a current through a superconducting coil. In order for all known materials to superconduct, they do have to be cooled to a very low temperature.
What else can I help you with?
How are rare earth magnets different to normal magnets?
Rare earth magnets, such as neodymium magnets, are much stronger than traditional magnets like ferrite magnets. They are also more expensive and are made with elements from the lanthanide series of the periodic table, making them rarer and harder to produce. Rare earth magnets can retain their magnetization over a longer period of time compared to normal magnets.
Does the magnetic field increase if there are more magnets?
Yes, the magnetic field strength will increase if there are more magnets because the magnetic fields generated by individual magnets add up. This is known as superposition, and the resultant field becomes stronger as more magnets are brought together.
Why permanent magnets are needed for an electric motor?
Permanent magnets are needed in an electric motor to create a constant magnetic field that interacts with the current flowing through the motor windings, resulting in motion. The magnets help to generate torque and provide a more efficient and controlled operation of the motor compared to electromagnets. With permanent magnets, the motor requires less power input to produce the required output.
Does putting magnets on a fridge use more energy?
No. The doors of the fridge have insulation in them, and the magnetic force does not affect temperature inside the fridge whatsoever.
Are smaller magnets stronger than larger magnets?
yes.in bigger magnets there are more magnetisom This is not true! In many cases larger magnets are stronger than smaller ones but not in all. I urge you to do research on reputable sites which can offer accurate answers to your questions. Magnet strength and effectiveness rely on size, age, gauss ratings as well as several other aspects. But do not take my word, please research further.
Do hot or cold magnets have more power?
Cold. If magnets get overheated, they can cease to work all-together.
Do all magnets have the same power?
No, not all magnets have the same power. The strength of a magnet is determined by factors such as its size, material, and how it is magnetized. Magnets can vary in terms of their pulling force, magnetic field strength, and overall magnetic power.
Why do big magnets pick up little magnets?
because it is bigger than the little magnets and has more power than the little magnets do.
How are rare earth magnets different to normal magnets?
Rare earth magnets, such as neodymium magnets, are much stronger than traditional magnets like ferrite magnets. They are also more expensive and are made with elements from the lanthanide series of the periodic table, making them rarer and harder to produce. Rare earth magnets can retain their magnetization over a longer period of time compared to normal magnets.
Can magnets pull more than their own mass?
Of course., they can.. What matters is how much is magnetic power (being more specific, electrically magnetic flux.). The attraction between two magnets is tremendously high with higher flux density magnets. (if you are more interested to know about, can browse for neodymium magnets!).
Do power trimmers save much more time compared to normal trimmers?
Power trimmers do save much more time than normal trimmers, but are more difficult to maintain.
What is more often used in magnets aluminum or nickel?
Nickel is used more in magnets
What is the normal size of a nuclear power plant?
There is no "normal size". The size depends on the design power level, the more power it is designed to generate the larger the plant will usually be.
What are the Advantages and disadvantages of permanent magnets?
permanent magnets and wound stators (temporary magnets) can be used inthe generators and motors. in small size generators (eg: dynamo in cycle),permanent magnets are used because, 1 it does not require electricity to magnetise 2 does not require stator cooling but in larger size generators and motors, temporary magnets are prefered because, 1 it is small in size of same power permanent magnets 2 we can control the stator magnetic field by adjusting the power 3 the magnetic flux density per square cm is more etc..
Which are better Little magnets or bigger magnets?
bigger magnets. 'cus bigger magnets have more force(also so called as attraction) . thus, smaller magnets have less attraction.
Where Are Magnets Used More?
I think magnets are used more around the house becuz u put them on refrigerators
Is generator power better than my normal electric power?
Your normal electric power is made to power all of your household. A generator requires much more maintenance, so if you have the option of using normal electric power, there is much less hassle. The generator can be kept for emergencies.
