What do u mean by retentivity?
the power of retaining
Definition of retentivity : the power of retaining specifically : the capacity for retaining magnetism after the action of the magnetizing force has ceased.
What is coercivity matter?
Coercivity is defined as the minimum value of magnetising intensity that is required to bring the material to its original state. In the case of a ferromagnetic substance, when the applied magnetic field is increased in the reverse direction, then at some point Hc the substance completely loses its magnetization.
What is meant by coercivity in physics?
Coercivity, also called the magnetic coercivity, coercive field or coercive force, is a measure of the ability of a ferromagnetic material to withstand an external magnetic field without becoming demagnetized.
What is coercivity of a magnet?
Coercive force or coercivity. This means the value of the external magnetic field that brings to zero the magnetization or magnetic flux density of a magnetic body when that external magnetic field is caused to operate in the opposite direction from the orientation of the magnetization of the magnetic body.
What is retentivity and coercivity of soft iron?
Steel has more coercivity and less retentivity compared to soft iron. Coercivity is the intensity of the applied magnetic field required to reduce the magnetization of a given material to zero. Retentivity is the capacity of an object to retain magnetism after the action of the magnetizing force has ceased.
What is low retentivity?
The retentivity of a material is its capacity to remain magnetized after the external magnetizing field has ceased to exist.A material with high retentivity (i.e. iron) will keep some magnetic properties, it will become a permanent magnet, whereas a material with low or no retentivity will not keep the magnetic …
What is retentivity in magnetic hysteresis?
Retentivity. The amount of magnetization present when the external magnetizing field is removed is known as retentivity. It is a material’s ability to retain a certain amount of magnetic property while an external magnetizing field is removed. The value of B at point b in the hysteresis loop.
What is coercivity of soft iron?
Soft iron is easily magnetized and demagnetized as compared to steel. The coercivity of soft iron is less than that of the coercivity of the steel. Energy loss in soft iron is less than energy loss in steel because of the small area of soft iron ( B – H ) curve.
What is the retentivity of soft iron?
Solution : Electromagnetics are made of soft iron because soft iron has low retentivity and lw coercive force or low coercivity . Soft iron is a soft magnetic material.
What is magnetic hardness?
The magnetic hardness is a measure of how easily a ferromagnetic material can be magnetized. Soft magnetic materials are easy to magnetize, hard magnetic materials are rather difficult to magnetize.
What is the unit of retentivity?
Retentivity is the ability of a material to resist or to retain magnetic field and it’s measured by the total strength of a magnetic field that is left in a material when an inducing field is removed from the material. The units in which retentivity of a material is measured is weber per square meter or Weberm−2.
What does the retentivity and coercivity of a material signify about the material?
1 Answer. Retentivity—It is the property of a magnetic material by which magnetism is left in the specimen even when magnetising field is reduced to zero. Coercivity—It is the property of a magnetic material which depends upon reverse value of magnetising field required to reduce residual magnetism to zero.
What is the difference between retentivity and coercivity?
Retentivity: The property of the magnetic material to retain magnetism even in the absence of the magnetizing field is known as retentivity or remanence. Coercivity: The magnetizing field (H) needed to demagnetize the magnetic material completely is known as its coercivity. Answer verified by Toppr Upvote (0)
What is meant by the term retentivity?
It has been observed that even if this reverse current is brought down to zero the magnetism of the ferromagnetic substance doesn’t die out. This property due to which the magnetism is retained even when the applied magnetic field is zero is called RETENTIVITY.
What is coercivity?
Coercivity: The magnetizing field (H) needed to demagnetize the magnetic material completely is known as its coercivity. Solve any question of Magnetism and Matterwith:- Patterns of problems Was this answer helpful? 0 0 Similar questions Define retentivity. Medium View solution The hysteresis cycle for the material of a transformer core is? Easy
What is the difference between retentivity and coercion in magnetism?
, Curious about Magnetism. This answer is in brief. Retentivity is the leftover magnetisation when the external magnetic field is made zero. Coercivity is the reverse external magnetic field applied to bring the leftover magnetisation (retentivity) to zero.