A substance, when placed in a magnetic field acquires feeble magnetization in a direction opposite to the applied field, is
Answer & explanation
Correct answer: option 2
The correct answer is Option (2) → Bismuth
A substance that is weakly magnetised opposite to the applied field is diamagnetic. Its magnetic susceptibility is small and negative, so it is feebly repelled by a magnet and moves from a stronger to a weaker part of the field. Bismuth is the standard example.
Option (2) Bismuth — Correct. Bismuth is diamagnetic, so its feeble magnetisation is opposite to the applied field.
NCERT (2026-27):
Diamagnetism – “… Diamagnetic substances are the ones in which resultant magnetic moment in an atom is zero. … Thus, the substance develops a net magnetic moment in direction opposite to that of the applied field and hence repulsion. Some diamagnetic materials are bismuth, copper, lead, silicon, nitrogen (at STP), water and sodium chloride.”