Eddy current testing can be carried out on all the metals provided the metals should be able to conduct the current. No need that it should have magnetic property. Magnetic praticle testing can be carried out only on ferromagentic materials since it works on magnetic permeabiltiy principle. Materials which has poor magnetic permeability is not able to test with MPI. This is very simple answer.
The B-H curve, also known as the magnetization curve, represents the relationship between the magnetic field (H) applied to a material and the magnetic induction (B) it exhibits in response. It shows how magnetization changes with the strength of an external magnetic field and helps characterize the magnetic properties of a material, such as ferromagnetic materials showing hysteresis.
Magnetic domains are microscopic areas of a solid where the atoms all have their magnetic moments aligned. If these domains are randomly aligned then a ferromagnetic material like iron or nickel will not have any permanent magnetism. If these domains start to align with each other the bulk material will show permanent magnetism. The area around a magnet where the force acts is the magnetic field.
There really isn't a "yes" or "no" answer to this question. There are two types of tin: white tin and gray tin. White tin is paramagnetic, while gray tin is diamagnetic. Paramagnetic materials will have its dipoles(a closed circulation of electric current) orient with the magnetic field, when exposed. Diamagnetic materials, on the other had, will orient the opposite field. There's a bit more to it than that...but without knowing your level of knowledge in physics and chemistry, it would be difficult to explain in its entirety. I hope that answered your question at least a little...
Neither, try again.
Simple answer. Materials like iron, nickel, cobalt and their alloys can be made to form permanent magnets, in which case the cause of the magnetization is the organization of the atoms in the material so that the atomic magnetic properties become the source of the magnetic field of the permanent magnet. To understand the details of how atoms make magnets takes a longer answer. First, let us establish the terminology. When we use the term permanent magnet, we refer to an object which produces a magnetic field as a result of the material of which it is made. (This distinguishes a permanent magnet from objects that have magnetic effects that are induced by another object or external magnetic field or an electrical current.) Second, identify the atomic origin of the magnetic characteristic. The thing that makes a permanent magnet is to be found in the atoms which compose the magnet and their arrangements. There are some subtle considerations if one wants to explain all of the details of the magnetic properties of a magnet, but the basic answer lies in the atoms and the electrons associated with the atoms of the object. Third, explain what creates the atomic characteristic. Individual atoms contain an important source of magnetism which is the motion of the electric charges associated with the electrons of the atoms. As the electrons move, they are themselves a form of electrical current and if the motion of the electrons results in a net circular motion around the atom, then that creates a magnetic field just as any current flowing creates a magnetic field. But, there is a very important additional motion and that is the spin of the electrons themselves. Each electron carries angular momentum as though it is a spinning top and so we say it has spin. As a charged object, the spin will also be associated with the circular motion of charge around its own axis of spin and this motion of charge also creates its own magnetic field. So, two separate sources of current can exist in an atom and so both can contribute to a magnetic field produced by an atom. (Many atoms and molecules have equal amounts of current flowing in opposite direction and do not produce a net magnetic field, but those which do have such a cancellation of currents may form magnetic materials.) Fourth, forming magnetic materials. Atoms (or atoms linked together as molecules) form material objects. As they are combined, so are the individual atomic properties of the atoms and molecules. These may be combined so the magnetic fields are added together or cancelled out and that depends on the materials involved and processes of making the material. In most common magnetic materials, the arrangement of the the atoms into a solid will also result in changes to the electronic structure of the constituent atoms, so that change in electronic structure can also enhance or even eliminate the contributions of the magnetic properties of the individual atoms. If the atomic arrangement and electronic structure changes are favorable, then the magnetic field that originate at the atomic level can add together to create a magnetic field that we observe in a permanent magnet. Final caveat. This is a qualitative description of the atomic origin of the magnetic property of a material and it is thus incomplete. There are many nuances to the origins of magnetism that can be discovered with further study. A quantitative description would employ electromagnetic theory and quantum mechanics and may even utilize the theory of relativity.
By changing the permiability of ferromagnetic meterials, surface and near surface discontinuities are traced, is the principle of magnetic particle testing. By changing the permiability of ferromagnetic meterials, surface and near surface discontinuities are traced, is the principle of magnetic particle testing.
The B-H curve, also known as the magnetization curve, represents the relationship between the magnetic field (H) applied to a material and the magnetic induction (B) it exhibits in response. It shows how magnetization changes with the strength of an external magnetic field and helps characterize the magnetic properties of a material, such as ferromagnetic materials showing hysteresis.
All metals can repel a magnet. The degree to which they do so is dependent on whether they are ferromagnetic, paramagnetic, or diamagnetic.A ferromagnetic metal is one which has a magnetic field regardless of whether or not they are subjected to an applied or external magnetic field. These are often called permanent magnets. The strength of their magnetic field varies depending on the strength of the external magnetic field, but has a limit outside of the external field. Iron is an example of a ferromagnetic metal.A paramagnetic metal is one which has a magnetic field only when subjected to an applied or external magnetic field. The strength of a paramagnetic metal's magnetic field tends to vary proportionally with the external magnetic field, and so these are often the strongest magnets that we see. An electromagnet is the easiest way to conceptualize the way a paramagnetic metal works. When an electromagnetic circuit is turned on, it's a magnet, when it's turned off, it's not. Tungsten is an example of a paramagnetic metal.Diamagnetism is a property of all materials, not just metals. This property is kind of hard to explain classically, so just think of it as a material's magnetic field created, when subjected to an external magnetic field, because of all of the material's electrons being pulled one way, and all of the material's protons being pushed the other way. The strength of a magnetic field from a purely diamagnetic material is farweaker than that of a paramagnetic or ferromagnetic material's magnetic field.
force that experience by ferromagnetic or paramagnetic substances when they are in the region of the magnetic field.For example, when you place a permenant magnet over an iron pin, the iron pin ( in this case, iron is ferromagnetic substances) is in the region of the magnetic field and attracted to the magnet.
When subatomic particles, like electrons, move through a magnetic field, they experience a force that causes them to curve. This is known as the Lorentz force. The direction of the curve depends on the charge of the particle and the direction of the magnetic field. This behavior is fundamental to understanding how particles interact in magnetic fields and is crucial in various scientific fields, including particle physics and quantum mechanics.
A magnet has both a South pole and a North pole. The magnetic properties of a magnet come from the alignment of electrons inside of the magnet. The North pole of a magnet will repel another North pole, but attract a South pole, and vice versa.
Magnetic lines do not cross each other. it is natural phenomenon.AnswerMagnetic 'lines of force' do not actually exist. They simply represent a 'model' which is used to explain the behaviour of a magnetic field through the use of something we can easily understand. In this case, one of the conditions for this model to apply is that these imaginary lines of force cannot intersect.The lines do not cross because the field can not have two values at one point. There is a basic equation that says that the lines always form closed loops:div B = 0, one of Maxwell's equations describing a property of the magnetic flux density B.
atom is the smallest particle of matter
atom is the smallest particle of matter
An electromagnet works by using electricity to create a magnetic field. When an electric current flows through a coil of wire, it generates a magnetic field around the wire. This magnetic field can attract or repel other magnetic materials, just like a permanent magnet. The strength of the magnetic field can be controlled by adjusting the amount of current flowing through the wire.
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Only making a guess because your setup is not something that can be inspected here, but an electromagnet must have a DC (direct current) power source. An AC (alternating current) coil will cause ferromagnetic materials near it to vibrate when the coil is powered up. The AC causes the magnetic field to reverse in sync with the changing polarity of the applied voltage in the coil. The magnetic field cannot "set up" in a "fixed" or "permanent" way to give you the effects you'd expect from an electromagnet. The only other thing that might explain the observed facts is that the coil is being pulsed by the DC, which would alternately turn the field on and off. This might also cause ferromagnetic materials near the magnet to vibrate when the coil is powered up.