Curie’s Law and Paramagnetism – Rankers Physics

Magnetic Properties of Matter: Practice Problem & Solution

Assertion (A): The product of magnetic susceptibility and absolute temperature of a paramagnetic substance is a constant. Reason (R): Paramagnetic substances obey Curie's law.  
Both (A) & (R) are true and the (R) is the correct explanation of the (A)
Both (A) & (R) are true but the (R) is not the correct explanation of the (A)
(A) is true but (R) is false
Both (A) and (R) are false

Solution Explained:

To solve this problem, we apply the core principles of Magnetic Properties of Matter. Understanding the underlying formula is key to arriving at the correct answer below:

Curie's law states that for paramagnetic substances, magnetic susceptibility (chi) is inversely proportional to absolute temperature (T), i.e., (chi = C/T). This implies (chi T = C), a constant. So Reason (R) directly explains Assertion (A).

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