MCQ
A ferromagnetic material is heated above its curie temperature. Which one is a correct statement
  • A
    Ferromagnetic domains are perfectly arranged
  • Ferromagnetic domains becomes random
  • C
    Ferromagnetic domains are not influenced
  • D
    Ferromagnetic material changes itself into diamagnetic material

Answer

Correct option: B.
Ferromagnetic domains becomes random
On heating, different domains have net magnetisation in them which are randomly distributes. Thus the net magnetisastion of the substance due to various domains decreases to minimum.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Similar questions

To make the frequency double of an oscillator, we have to
A particle is placed at the origin and a force $F=k x$ is acting on it (where $k$ is positive constant). If $U(0)=0$, the graph of $U(x)$ versus $x$ will be (where $U$ is the potential energy function)
The $P-V$ diagram of a system undergoing thermodynamic transformation is shown in figure. The work done by the system in going from $A \rightarrow B \rightarrow C$ is 30 J and 40 / heat is given to the system. The change in internal energy between $A$ and $C$ is
Image
The pole strength of a bar magnet is $48$ ampere-metre and the distance between its poles is $25 \mathrm{~cm}$. The moment of the couple by which it can be placed at an angle of $30$ with the uniform magnetic intensity of flux density $0.15$ Newton /ampere-metre will be
The dimensions of universal gravitational constant are
$P-V$ diagram of a cyclic process $A B C A$ is as shown in figure. Choose the correct statementImage
The escape velocity for a body projected vertically upwards from the surface of earth is $11 \mathrm{~km} / \mathrm{s}$. If the body is projected at an angle of 45 with the vertical, the escape velocity will be
The maximum velocity at the lowest point, so that the string just slack at the highest point in a vertical circle of radius $l$
Audio signal cannot be transmitted because
A smooth sphere of mass $M$ moving with velocity $u$ directly collides elastically with another sphere of mass $m$ at rest. After collision their final velocities are $v$ and $v$ respectively. The value of $v$ is