The magnetic particles in a ferrofluid are made of:

  1. a soft (temporary) magnetic material such as magnetite
  2. a permanent magnet material
  3. copper
  4. plastic
Answer

A) a soft (temporary) magnetic material such as magnetite

They magnetise only when a field is applied. SLO P-09-E-09 · Understanding

Physics MCQ · More Magnetism and Electromagnetic Induction MCQs · Practise