Which of the following arrangements represents alignment of magnetic moments of Ferrimagnetic substance?
Answer & explanation
Correct answer: option 1
The correct answer is Option (1) → arrangement A
In arrangement A the moments point in both directions but in unequal numbers (six up, two down), so a net moment remains: this is ferrimagnetism.
Why the other options are incorrect
Option (2) — Incorrect. All moments point the same way (all up): this is ferromagnetic alignment.
Option (3) — Incorrect. All moments point the same way (all down): also ferromagnetic.
Option (4) — Incorrect. Up and down moments alternate in equal numbers and cancel: this is antiferromagnetic, as in MnO.
Note: This question is from the pre-rationalised NCERT book (2022-23). The topic is not there in the latest NCERT book (2026-27), and it is also out of the CUET 2026 syllabus.
NCERT (Pre-rationalised edition, 2022-23):
Magnetic Properties – …
