For a permanent magnet,which of the following | vedclass

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

Question

(B) permanent magnet must retain its magnetism even in the presence of external demagnetizing fields. Retentivity is the ability of a material to reta

Vedclass · Accepted Answer

High coercivity

Vedclass · Answer

(B) permanent magnet must retain its magnetism even in the presence of external demagnetizing fields. Retentivity is the ability of a material to retain magnetism after the external field is removed,which should be high. Coercivity is the measure of the resistance of a ferromagnetic material to becoming demagnetized. For a permanent magnet,the material must be magnetically hard,meaning it should have high retentivity and high coercivity to prevent easy demagnetization. Therefore,high coercivity is a fundamental requirement.

For a permanent magnet,which of the following properties is essentially required?

Similar Questions

The Curie-Weiss law is obeyed by iron at a temperature ......

$A$ diamagnetic material in a magnetic field moves:

The materials suitable for making electromagnets should have

Assertion: $A$ disc-shaped magnet is levitated above a superconducting material that has been cooled by liquid nitrogen.
Reason: Superconductors repel a magnet.

The relative permeability is represented by $\mu_r$ and the susceptibility is denoted by $\chi$ for a magnetic substance. Then for a paramagnetic substance:

Vedclass Test Series

Exam Paper Generator

Online Exam Module