Paramagnetic substances:
A. align themselves along the directions of external magnetic field.
B. attract strongly towards external magnetic field.
C. has susceptibility little more than zero.
D. move from a region of strong magnetic field to weak magnetic field.
Choose the most appropriate answer from the options given below:

Solution

Physics sir · 2 steps

Paramagnets respond only weakly to a field: they line up with it and get pulled gently, never strongly.

1. What paramagnets are. Each atom carries a small permanent magnetic moment. With no field the moments point randomly; an external field turns them partly along itself, so the material gets a weak magnetisation in the direction of the field.

   Statement	True for paramagnets?	Reason
   A: align along the field	Yes	The atomic moments, and a paramagnetic rod, turn along B⃗
   B: attracted strongly	No	The pull is weak. Strong attraction is the mark of a ferromagnet
   C: susceptibility a little more than zero	Yes	χ is small and positive, about 10⁻⁵ to 10⁻³
   D: move from strong to weak field	No	That is diamagnetic behaviour. Paramagnets move from weak to strong field

2. So. Only A and C are correct, which is option (b).

The idea to keep. Sort by χ: diamagnetic is small negative and moves to weaker field, paramagnetic is small positive and is pulled weakly to stronger field, ferromagnetic is large positive and is pulled strongly.

Answer from the NTA final answer key. Solution by PrepWiser.