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How can the magnetism of a permanent magnet be weakened or removed?
Wiki User
∙ 13y ago
Put it in a coil which has an alternating current in it. The AC current produces a magnetic field in the coil which alternates with the changing voltage. This changes the magnetism of the permanent magnet. Gradually reduce the current in the coil and the permanent magnet will end up unmagnetised.
Wiki User
∙ 13y ago
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What is the difference between permanent pole and temporary pole?
a Temporary Magnet lose its magnetism quickly, a Permanent Magnet is hard and it keeps it magnetism
Why do magnets make a N and S pole when you break a magnet?
Because in a permanent magnet, there is always a magnetic field, if the permanent magnet is broken, and didn't have a S and a N, then magnetism would cease to exsist.
Does putting a magnet in the water for 60 minutes make the magnet lose its magnetism?
No it wont but if the water is hot then it will lose its magnetism
What causes magnetism at a microscopic level?
Basically, all magnetism is caused by electric currents - movement of charges. At the microscopic level, magnetism (in a permanent magnet) is caused by the spin of the electron, as well as the electron's orbit around the atom.
What type of magnet has iron in it?
magnetism
What type of magnetism is present in a bar magnet?
The known magnetism in a bar magnet is electromagnetism.
What is the difference between permanent pole and temporary pole?
a Temporary Magnet lose its magnetism quickly, a Permanent Magnet is hard and it keeps it magnetism
Define permanant magnet?
(n.) a magnet that retains its magnetism after being removed from an external magnetic field
What kind of magnet is strong and will not lose its magnetism unless damaged?
Something called a permanent magnet
How is is an electromagnet different from a magnet?
an electromagnet is a type of magnet that is created by an electric current. the magnetism disappears when the current is removed. if you have a landline phone and the phone line runs right next to a power line and you hear a buzzing in the line, you're hearing electromagnetic interference a permanent magnet is a type of magnet that is created by aligning the molecules by pole. this type of magnet will not lose it's magnetism in our lifetime.
What is the difference between a permanent magnet and a temporary magnet?
Temporary magnet: good example is an electromagnet. It maintains magnetic attraction only so long as an electric current surrounds it. Permanent magnet: most common. Example: bar magnet. Will maintain magnetic properties for quite a while, although they can be eventually demagnetized.
Is a permanent a magnet?
A permanent magnet is a magnet which will keep its magnetism for a very long time and is difficult to change. No, As I think a permanent magnet means they have abilities to hold the magnetism when they are magnetized. Such as Alnico permanent magnets, but in fact, they can be demagnetized,such as high temperature, hit each other,pulse waves, out magnetic field influence...What's more, different permanent magnetic material, have different abilities on holding magnetism,they can be used in different environments. you can find some details from some manufacturers website, to learn some knowledges.
Why do magnets make a N and S pole when you break a magnet?
Because in a permanent magnet, there is always a magnetic field, if the permanent magnet is broken, and didn't have a S and a N, then magnetism would cease to exsist.
A permanent magnet will lose magnetism?
Under some conditions, sure. Impact and intense heat for instance can render a magnet weaker.
What role do electrons play in magnetism?
Magnetism is produced through electric currents. In the case of a permanent magnet, it is the electrons circling around the atomic nucleus that produces the magnetism (more atoms have one orientation than the opposite orientation).Magnetism is produced through electric currents. In the case of a permanent magnet, it is the electrons circling around the atomic nucleus that produces the magnetism (more atoms have one orientation than the opposite orientation).Magnetism is produced through electric currents. In the case of a permanent magnet, it is the electrons circling around the atomic nucleus that produces the magnetism (more atoms have one orientation than the opposite orientation).Magnetism is produced through electric currents. In the case of a permanent magnet, it is the electrons circling around the atomic nucleus that produces the magnetism (more atoms have one orientation than the opposite orientation).
Is alloy a permanent magnet?
What alloy? Usually Fe-Nd-Ni_Co alloys shows magnetism..
What is induced magnetism?
In the simplest terms, Induced Magnetism is the magnetism of an object as a result of an external influence. Typically, the external influence is a magnetic field due to another object. (One also hears the term transient magnetism applied to the same phenomenon. To be considered transient, the magnetism must disappear when the external influence disappears, but to be "induced" it just has to appear.) Though this is a technical term, it has a meaning that is the normal meaning of "induced," as in "caused by." This is to be contrasted with other modifiers, like "permanent magnetism" or "remnant magnetism" or "spontaneous magnetism" which are all still magnetism of an object but with a modifier further describing the magnetic state. If one is being more technical, then in scientific circles the term "induced magnetism" usually refers the situation where an object acquires a magnetic field as a result of it being in some external magnetic field even though it is not normally a magnetized material. One see this all the time. If you bring a permanent magnet near a collection of paperclips, then the paperclips all attach to one another and to the permanent magnet. Each paperclip has become, temporarily, a magnet. If the permanent magnet is removed, the paperclips no longer attach to one another. The magnetic properties of the paperclips were "induced" and not a permanent characteristic. More technicalities can be present with this term, because magnetism in an object can be induced in other ways than the application of a magnetic field. In the absence of such technical considerations, it is safe to assume that the term "induced magnetism" just means a temporary state of magnetization of an object induced by an external magnetic field provided by a permanent magnet or an electromagnet.
