BRAINCAKEElectromagnetic induction
Revision notes for Electromagnetic induction in Edexcel Combined Science (1SC0). Every lesson in BrainCake comes with R.E.C.I.P.E. recall steps, a quick check and spaced reviews.
- Factors affecting induced potential difference, and how the induced field opposes the changeWhen a wire moves through a magnetic field, or a magnet moves into or out of a coil, a potential difference is made across the wire or coil.
- Transformers and induction between circuitsA transformer is made of two coils of insulated wire wound on the same iron core.
- A transformer can change the size of an alternating voltageThe main job of a transformer is to change the size of an alternating voltage.
- Why electricity is transmitted at high voltage in the national gridThe national grid is the network of cables, pylons and transformers that transfers electrical energy from power stations to homes and businesses.
- Step-up and step-down transformers in the national gridPower stations generate electricity at a relatively low potential difference.
- The transformer power equationA transformer does not create energy.