When the magnet is removed, a ferrofluid:

  1. stays spiky permanently
  2. evaporates
  3. returns to an ordinary liquid shape
  4. becomes a solid magnet
Answer

C) returns to an ordinary liquid shape

Soft magnetic material: magnetism is temporary. SLO P-09-E-09 · Understanding

Physics MCQ · More Magnetism and Electromagnetic Induction MCQs · Practise