What is Curie temperature? And what is retentivity?
(N/A) Curie temperature: It is the temperature above which a ferromagnetic material becomes paramagnetic. Below this temperature,the material exhibits ferromagnetism.
Retentivity: For a ferromagnetic substance,in the $B-H$ hysteresis loop,the value of magnetic induction $B$ at $H=0$ is called retentivity. It represents the residual magnetism left in the material after the external magnetic field is removed.
Retentivity: For a ferromagnetic substance,in the $B-H$ hysteresis loop,the value of magnetic induction $B$ at $H=0$ is called retentivity. It represents the residual magnetism left in the material after the external magnetic field is removed.
Explore More
Similar Questions
In the hysteresis cycle,the value of $H$ needed to make the intensity of magnetisation zero is called
Easy
View SolutionThe energy dissipated per unit volume per cycle in the hysteresis of an iron sample of mass $10 \, kg$ is $200 \, J \, m^{-3} \, cycle^{-1}$. The density of iron is $7500 \, kg \, m^{-3}$. The loss of energy per hour at $50 \, cycle \, s^{-1}$ is: (in $J$)
DifficultAP EAMCET 2017
View SolutionIn the following graph of flux density $(B)$ versus magnetizing force $(H)$,coercivity and retentivity are respectively represented by the points
Hysteresis loops for two magnetic materials $A$ and $B$ are given below. These materials are used to make magnets for electric generators,transformer cores,and electromagnet cores. Then it is proper to use:
$A$ metal rod is subjected to cycles of magnetisation at the rate of $42 \ Hz$. The density of the metal is $6 \times 10^3 \ kg \ m^{-3}$ and its specific heat capacity is $0.1 \times 10^3 \ cal \ kg^{-1} \ ^{\circ}C^{-1}$. If the area of its $B-H$ loop corresponds to an energy density of $10^{-2} \ J \ m^{-3}$,then the rise in its temperature in one minute is: (in $^{\circ} C$)
Vedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo