Each job needs either a temporary magnet (one you can switch off) or a permanent one (one that stays). Pick a material, switch on the magnetising field from the coil and watch the tiny domains line up, then switch the field off. Soft iron lines up easily but falls back to a jumble the moment the field goes. Steel is harder to line up, but it holds. Choose the material the job actually needs.
MissionPick the right material for the job below.Round 1Streak 0Best 0
Material:
When the field is switched off, the sample will:
materialsoft iron
magnetising fieldoff
magnetism0%
this job needsread the description
Soft iron: easy to magnetise, easy to lose. Steel: hard to magnetise, but it keeps it.