Physics · GCSE · Electricity & Magnetism

The magnetic field of a current: wires and solenoids

The magnetic field of a current: wires and solenoidsFree3:49Heddy Score 3 of 7, below the standard
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What you need to know

  • A current-carrying wire produces a magnetic field whose direction reverses when the current reverses.
  • Use the right-hand grip rule to relate conventional current to field direction.
  • A solenoid produces a strong, approximately uniform field inside the coil.
  • Increasing the current or turns per unit length, or adding an iron core, strengthens the solenoid’s field.

In this clip

Runs 3:49, from 0:00 to 3:49 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

465K views · Freesciencelessons 995K subscribers

As reported by YouTube on 2026-11-02. Not part of the Heddy Score.
How the Heddy Score works

Why we picked it

The wire and solenoid explanations connect field patterns with ways to strengthen an electromagnet.

Freesciencelessons on YouTubechecked 2026-10-18

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