Multiple choice

Which of the following would be most powerful electromagnet?

  1. Air

  2. Copper

  3. Steel

  4. Soft iron

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Soft iron is a ferromagnetic material that is easily magnetized and demagnetized, making it ideal for creating strong temporary electromagnets. Steel retains magnetism, making it better for permanent magnets.