Assertion (A) Above Curie temperature, a ferromagnetic material becomes paramagnetic. Reason (R) When a magnetic material is heated to very high temperature, it loses its magnetic properties.

Question

Assertion (A) Above Curie temperature, a ferromagnetic material becomes paramagnetic. Reason (R) When a magnetic material is heated to very high temperature, it loses its magnetic properties. (A) If both Assertion and Reason are true and Reason is correct explanation of Assertion. (B) If both Assertion and Reason are true but Reason is not the correct explanation of Assertion. (C) If Assertion is true but Reason is false. (D) If both Assertion and Reason are false.

Tardigrade Admin · Accepted Answer

Above Curie temperature TC, the magnetic susceptibility of a ferromagnetic material varies as chim propto (1/T-TC) when temperature is increased beyond TC, ferromagnetic material becomes paramagnetic.

Q. Assertion $(A)$ Above Curie temperature, a ferromagnetic material becomes paramagnetic.
Reason $(R)$ When a magnetic material is heated to very high temperature, it loses its magnetic properties.

If both Assertion and Reason are true and Reason is correct explanation of Assertion.

If both Assertion and Reason are true but Reason is not the correct explanation of Assertion.

If Assertion is true but Reason is false.

If both Assertion and Reason are false.

Above Curie temperature $T_{C}$ , the magnetic susceptibility of a ferromagnetic material varies as
$χ_{m} \propto \frac{1}{T - T _{C}}$
when temperature is increased beyond $T_{C}$ , ferromagnetic material becomes paramagnetic.

Q. Assertion (A) Above Curie temperature, a ferromagnetic material becomes paramagnetic. Reason (R) When a magnetic material is heated to very high temperature, it loses its magnetic properties.