Question

There are four lightweight rod samples P, Q, R and S separately suspended by thread. A bar magnet is slowly brought near to each sample and the following observations are noted
(a) P is weakly repelled
(b) R is strongly attracted
(c) S remains unaffected
(d) Q is weakly attracted
Which of the following is true?

• A. R is of a diamagnetic material
• B. P is of a non-magnetic material
• C. S is of a ferromagnetic material
• D. Q is of a paramagnetic material

Hint:

Weak repulsion means diamagnetic, weak attraction means paramagnetic, strong attraction means ferromagnetic.

Answer 1

The Correct Option is D

Step 1: Understanding the Concept
Diamagnetic materials are weakly repelled. Paramagnetic materials are weakly attracted. Ferromagnetic materials are strongly attracted.

Step 2: Apply to each sample
P is weakly repelled, so it is diamagnetic.
R is strongly attracted, so it is ferromagnetic.
S is unaffected, so it is non-magnetic.
Q is weakly attracted, so it is paramagnetic.

Step 3: Check the statements
Only the statement that Q is paramagnetic is true.

Final Answer:
Q is made of a paramagnetic material. \[ \boxed{\text{(D) }\text{Q is of a paramagnetic material}} \]