If the B-H curves of two samples P and Q of i | vedclass

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

Question

(B) The $B-H$ curve (hysteresis loop) provides information about the magnetic properties of a material.$1$. Permanent magnets require materials with h

Vedclass · Accepted Answer

$P$ is suitable for making permanent magnet and $Q$ for making electromagnet

Vedclass · Answer

(B) The $B-H$ curve (hysteresis loop) provides information about the magnetic properties of a material.$1$. Permanent magnets require materials with high retentivity and high coercivity so that they do not lose their magnetism easily. $A$ larger hysteresis loop area indicates higher coercivity.$2$. Electromagnets require materials with high permeability,low retentivity,and low coercivity so that they can be easily magnetized and demagnetized. $A$ smaller hysteresis loop area indicates lower coercivity.$3$. From the given graphs,sample $P$ has a larger hysteresis loop area (higher coercivity),making it suitable for permanent magnets.$4$. Sample $Q$ has a smaller hysteresis loop area (lower coercivity),making it suitable for electromagnets.Therefore,$P$ is suitable for a permanent magnet and $Q$ is suitable for an electromagnet.

If the $B-H$ curves of two samples $P$ and $Q$ of iron are as shown below,then which one of the following statements is correct?

Similar Questions

In the following graph of flux density $(B)$ versus magnetizing force $(H)$,coercivity and retentivity are respectively represented by the points

If the given figure shows the relation between magnetic field ($B$ - along $y$-axis) and magnetic intensity ($H$ - along $x$-axis) of a ferromagnetic material,then the point that represents the coercivity of the material is

The coercivity of a magnet is $5 \times 10^3 \text{ A/m}$. The amount of current required to be passed in a solenoid of length $30 \text{ cm}$ and the number of turns $150$,so that the magnet gets demagnetized when placed inside the solenoid is ............. $A$.

$A$ bar magnet has a coercivity of $4 \times 10^3 \, A \, m^{-1}$. It is desired to demagnetize it by inserting it inside a solenoid $12 \, cm$ long and having $60$ turns. The current that should be sent through the solenoid is . . . . . . $A$.

The $B-H$ curves $S_1$ and $S_2$ in the adjoining figure are associated with:

Vedclass Test Series

Exam Paper Generator

Online Exam Module