Which change does NOT increase the strength of an electromagnet?

  1. adding more turns
  2. using a soft-iron core
  3. replacing the iron core with a wooden core
  4. increasing the current
Answer

C) replacing the iron core with a wooden core

Wood isn't magnetic. SLO P-09-E-36 · Knowledge

Physics MCQ · More Magnetism and Electromagnetic Induction MCQs · Practise