The figure illustrates how B,the flux density | vedclass

Name: Exam Paper Generator | JEE NEET Paper Generator | Vedclass
Brand: Vedclass
Rating: 5 (35 reviews)

Question

(B) The correct option is $B$.In the given hysteresis loop,$OQ$ represents the retentivity (or remanence) of the material,which is the residual magnet

Vedclass · Accepted Answer

$OQ$ and $OR$ both should be large

Vedclass · Answer

(B) The correct option is $B$.In the given hysteresis loop,$OQ$ represents the retentivity (or remanence) of the material,which is the residual magnetic flux density when the external magnetic field is reduced to zero.$OR$ represents the coercivity of the material,which is the strength of the reverse external magnetic field required to demagnetize the material completely.For a material to be suitable for making a permanent magnet,it must have high retentivity so that it remains strongly magnetized,and high coercivity so that it is not easily demagnetized by external magnetic fields,temperature fluctuations,or mechanical shocks.Therefore,both $OQ$ and $OR$ should be large.

The figure illustrates how $B$,the flux density,inside a sample of ferromagnetic material varies with external magnetic field $B_0$. For the sample to be suitable for making a permanent magnet,

Similar Questions

For substances,hysteresis $(B-H)$ curves are given as shown in the figures. Which of the following is best for making a temporary magnet?

The intensity of magnetisation $I$ is plotted against the magnetising field $H$ for different substances. The curves $A$ and $B$ shown in the adjoining figure are associated with

The area of the $B-H$ hysteresis loop is an indication of the

The magnet can be completely demagnetized by

The area of the hysteresis loop of a material is equivalent to $250 \, J$. When $10 \, kg$ of the material is magnetized by an alternating field of $50 \, Hz$, what is the energy lost in one hour? (Given: density of the material is $7.5 \, g/cm^3$)

Vedclass Test Series

Exam Paper Generator

Online Exam Module