Multiple choice

Which of the following can be used as a magnetic keeper?

  1. Stainless steel

  2. Iron

  3. Alnico

  4. Wood
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Iron is the best material for magnetic keepers. A magnetic keeper (or magnet keeper) is a soft iron piece placed across the poles of a horseshoe magnet to preserve its strength. Soft iron has high magnetic permeability, allowing it to provide a low-reluctance path for magnetic flux, preventing self-demagnetization. Stainless steel is not magnetic enough, alnico is already a magnet, and wood is non-magnetic.

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