Question

$\text{Statement I}:$ The ferromagnetic property depends on temperature. At high temperature, ferromagnet becomes paramagnet.
$\text{Statement II}:$ At high temperature, the domain wall area of a ferromagnetic substance increases.

In the light of the above statements, choose the most appropriate answer from the options given below :

• A. $\text{Statement I}$ is false, but $\text{Statement II}$ is true.
• B. Both $\text{Statement I}$ and $\text{Statement II}$ are true.
• C. $\text{Statement I}$ is true, but $\text{Statement II}$ is false.
• D. Both $\text{Statement I}$ and $\text{Statement II}$ are false.

Answer 1

The correct option is C $\text{Statement I}$ is true, but $\text{Statement II}$ is false.

As temperature increases, domains disintegrate so ferromagnetism decreases and above curie temperature it becomes paramagnet.

Also, at high temperature the domain area of ferromagnetic substance decreases.

Hence, $\left(A\right)$ is the correct answer.