Physics · KS3 Y9 · Electricity & Magnetism

Making an electromagnet stronger

Making an electromagnet strongerFree2:29Heddy Score 3 of 7, below the standard

What you need to know

  • An electric current creates a magnetic field around a wire.
  • Coiling the wire strengthens the field, and an iron core makes an electromagnet stronger.
  • Reversing the current reverses the field; changing current or coil turns changes its strength.

In this clip

Runs 2:29, from 0:09 to 2:38 of the full video.

Heddy Score3/7, Below the standard
See the seven stars
  • Trusted source · passed. The creator's own upload, live and playable here.
  • On the map · not judged yet. A teacher watched it: it mainly teaches this map topic.
  • Spec-true · not judged yet. Accurate, and right for the current UK specification.
  • Focused · passed. One idea, short enough to watch in one go.
  • Accessible · passed. Good captions, clear sound and pictures.
  • Safe for children · not judged yet. Right for 11 to 16 year olds, with no sales pitch.
  • Proven · not judged yet. Earned from our students: they learn from it, find it helpful and watch it to the end.
★ passed · ☆ pending · ✕ failed
Our students

Not enough students yet

Our own students' answers. These are what move ★7 Proven.
On YouTube

947K views · 6.11K likes · Science Buddies 455K subscribers

As reported by YouTube on 2026-11-01. Not part of the Heddy Score.
How the Heddy Score works

Why we picked it

Demonstrates how current, coil shape and an iron core affect an electromagnet.

Science Buddies on YouTubechecked 2026-10-20

Plays from youtube-nocookie.com. No YouTube cookies until you press play.