When the current in an electromagnet with a soft-iron core is switched off:

  1. the core melts
  2. the core loses most of its magnetism
  3. the poles swap
  4. the core becomes strongly magnetised
Answer

B) the core loses most of its magnetism

Soft magnetic behaviour. SLO P-09-E-36 · Knowledge

Physics MCQ · More Magnetism and Electromagnetic Induction MCQs · Practise