Question

According to Curie’s Law, what happens to magnetic susceptibility if absolute temperature is doubled?

• A. It doubles
• B. It is halved
• C. It remains constant
• D. It becomes zero

Hint:

Curie’s Law applies to paramagnetic materials and shows that increasing temperature weakens magnetization because thermal agitation disturbs the alignment of magnetic moments.

Answer 1

The Correct Option is B

Concept:
Curie’s Law states that the magnetic susceptibility of a paramagnetic material is inversely proportional to the absolute temperature. :contentReference[oaicite:1]{index=1} where \( \chi \) is magnetic susceptibility, \( C \) is Curie constant, and \( T \) is absolute temperature.

Step 1: Understand the proportionality from Curie’s Law. \[ \chi \propto \frac{1}{T} \]

Step 2: Analyze the effect of doubling temperature. If temperature becomes \(2T\): \[ \chi' = \frac{C}{2T} = \frac{1}{2}\left(\frac{C}{T}\right) \]

Step 3: Interpret the result. The new susceptibility becomes half of the original value. Hence, \[ \boxed{\text{Magnetic susceptibility is halved}} \]