The field of a solenoid with an iron core may be hundreds of times stronger because iron has:

  1. a high relative permeability
  2. low density
  3. a low melting point
  4. high resistivity
Answer

A) a high relative permeability

Permeability measures how easily it magnetises. SLO P-09-E-36 · Knowledge

Physics MCQ · More Magnetism and Electromagnetic Induction MCQs · Practise