Concept 6 of 8Foundation
Watch on YouTubeVideoMaking your own magnet
Three ways to magnetize an iron/steel bar:
- Single-touch method: stroke the bar from one end to the other with a strong magnet, in the SAME direction, many times.
- Induction: place iron near a strong magnet (gets magnetic, usually temporarily).
- Electromagnet: wrap insulated wire around iron and pass current. Iron becomes a magnet only while current flows.
Example
Stroke a steel needle 50 times in one direction with a bar magnet — the needle can now attract pins.
💡 Tip:Electromagnets are powerful AND controllable (on/off) — used in cranes, doorbells, relays, loudspeakers.
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5 questions to check what you just read.
0 / 5
- Q1.Easiest way to magnetise a steel needle:
- Q2.Iron near a strong magnet becomes:
- Q3.Electromagnet needs:
- Q4.Why stroke needle in ONE direction only?
- Q5.Which material can be made into a permanent magnet most easily?