Question

Susceptibility of a paramagnetic substance is

• A. negative and large.
• B. negative and small.
• C. positive and large.
• D. positive and small.

Hint:

Magnetic susceptibility:
• diamagnetic \(\rightarrow\) negative and small
• paramagnetic \(\rightarrow\) positive and small
• ferromagnetic \(\rightarrow\) positive and very large e}

Answer 1

The Correct Option is D

Step 1: Understanding the Concept:
Paramagnetic materials have unpaired electrons that align weakly with an external magnetic field.
Step 2: Key Formula or Approach:
Curie's Law: $\chi = C / T$.
Step 3: Detailed Explanation:
Magnetic susceptibility $\chi$ is positive for paramagnetic substances because they get magnetized in the field's direction. It is small because the alignment is weak at normal temperatures.
Step 4: Final Answer:
Susceptibility is positive and small.