0
False
permanent magnets can but electromagnets need a running current A+
Wiki User
∙ 11y ago
Wiki User
∙ 12y agoAlnico is the usual metal used in making permanent magnets. The material should metal and can be polarized.
Wiki User
∙ 6y agoWe generally refer to this as a permanent magnet.
Wiki User
∙ 14y agoPermeable ones.
Wiki User
∙ 12y agoferromagnetic
Wiki User
∙ 7y agoThey are permanent magnets.
Wiki User
∙ 6y agoIron
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Does a greenhouse retain or release heat?
Compared to the external environment, a greenhouse will retain heat.
Does saltwater prove to retain heat the best or freshwater?
Answer: Pure water has the best capacity for heat of any material known to man, so any impurity must reduce its ability.
Can a magnet be broken?
Not exactly. All pieces of the magnet retain their ferrous properties, but if they were (for example) dropped, then the shock of the fall could potentially make them lose a bit of magnetism. Extreme temperature changes and high power electric discharges could also decrease the power of the magnet.
What does retain mean in science?
to hold onto a characteristic through time
Which is the best reading method to use when you are studying a text and trying to make sense of and retain the information?
scanning
A material that holds its magnetic properties without losing them is a?
ferromagnetic material, such as iron, nickel, or cobalt. These materials can retain their magnetization even after the external magnetic field is removed.
What is magnetization of iron?
the process of converting iron to a permanent magnet is called magnetization. As iron is a ferro magnetic material it is magnetized by applying strong magnetic field across it , this makes the alignment of all the magnetic dipoles present in iron in the same direction .Even after the external magnetic field is removed they retain their arrangement , thus it becomes a permanent magnet
The ability of material to retain its magnetism is known as?
The ability of a material to retain its magnetism is known as magnetic hysteresis. It refers to the phenomenon where a material retains some magnetization even after the external magnetizing field is removed.
Is antimony magnetic?
Antimony is not magnetic in standard conditions because it is a diamagnetic material, meaning it creates a weak repulsive force in the presence of a magnetic field. It does not retain magnetization when the external magnetic field is removed.
A ferromagnetic material is best defined as any material that?
exhibits strong magnetic properties due to the alignment of magnetic moments in its structure. Ferromagnetic materials can be easily magnetized and retain their magnetization after the magnetic field is removed.
What is true about a ferromagnetic material?
A ferromagnetic material has a high magnetic permeability and can retain a strong magnetic field once magnetized. It exhibits spontaneous magnetization and can be easily magnetized and demagnetized. Ferromagnetic materials include iron, nickel, and cobalt.
Is a Refrigerator magnet a Permanent magnet?
No, a refrigerator magnet is not a permanent magnet. Refrigerator magnets are usually made of soft magnetic materials that become temporarily magnetized when in the presence of a magnetic field, allowing them to stick to the refrigerator. Permanent magnets, on the other hand, retain their magnetization over time without the need for an external magnetic field.
What is the significance of hysteresis?
Hysteresis is the delay between an observed outcome and the quantity of change applied.When a ferromagnetic material is magnetized in one direction, it will not relax back to zero magnetization when the imposed magnetizing field is removed. It must be driven back to zero by a field in the opposite direction. If an alternating magnetic field is applied to the material, its magnetization will trace out a loop called ahysteresis loop. The lack of retraceability of the magnetization curve is the property called hysteresis and it is related to the existence of magnetic domains in the material. Once the magnetic domains are reoriented, it takes some energy to turn them back again. This property of ferrromagnetic materials is useful as a magnetic "memory". Some compositions of ferromagnetic materials will retain an imposed magnetization indefinitely and are useful as "permanent magnets". The magnetic memory aspects of iron and chromium oxides make them useful in audiotape recording and for the magnetic storage of data on computer disks.Variations in Hysteresis CurvesThere is considerable variation in the hysteresis of different magnetic materials.
What causes a material to be classified as ferromagnetic?
Ferromagnetic materials have unpaired electrons in their atoms, which create magnetic moments that align spontaneously in the same direction when a magnetic field is applied. This alignment leads to the material exhibiting strong magnetic properties such as being able to retain magnetization after the external field is removed.
What is a piece of magnetic material that remains its magnetic proporties after it is removed form a magnetic field?
A piece of magnetic material that retains its magnetic properties after being removed from a magnetic field is called a permanent magnet. These materials are able to maintain their magnetization due to their intrinsic magnetic orientations at the atomic level.
Why can some metals act like permanent magnets?
Some metals can act like permanent magnets because their atomic structure allows for unpaired electrons to align and create a magnetic field. These materials are called ferromagnetic materials, and they retain their magnetization even after the magnetic field that initially magnetized them is removed. This alignment of electron spins forms magnetic domains within the material, resulting in a net magnetic field.
What is the difference between hard and soft magnetic materials?
Hard magnetic materials retain their magnetization once magnetized, while soft magnetic materials quickly lose their magnetization once the magnetic field is removed. Hard magnets are used in permanent magnets, while soft magnets are used in transformers and electrical motors.
