Physics · KS3 Y8 · Electricity & Magnetism

Voltage: the electrical push

p56Free4:30Heddy Score 2 of 7, below the standard

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

What you need to know

  • Resistance is how much a component opposes the flow of current.
  • Resistance equals potential difference divided by current, measured in ohms.
  • For the same potential difference, a larger resistance gives a smaller current.

In this clip

1:45–4:30Calculating resistance (R = V ÷ I)p59
Also coversResistance: what opposes currentp58
Also coversVoltage: the electrical pushp56
Heddy Score2/7, Below the standard
  • 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 · not judged yet. 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.
How the Heddy Score works

Why we picked it

Freesciencelessons introduction to resistance and calculating it from potential difference and current; GCSE, also fits Year 9.

Freesciencelessons on YouTubechecked 2026-10-16