GCSE Physics (AQA)

346 videos | 23 hours

Parts of a Transformer

Please subscribe to watch this video.

This, and all other videos, are included in our premium subscriptions.

Premium accounts get access to all videos.

Magnetism and electromagnetism Induced potential, transformers and the National Grid

Parts of a Transformer

2:41 Transformers
Spec 4.7.3.4
Previous Factors Affecting an Induced Potential Difference Next Generator Effect in a Transformer
  • A transformer is a device used to modify the potential difference of an alternating current.
  • Transformers are commonly seen outside power plants to convert the potential difference of electric currents.
  • An input current with an input potential difference is provided to one terminal of the transformer.
  • The transformer requires alternating current, which is constantly changing, to function.
  • The output from the second terminal is another alternating current with a different potential difference, generated using the input current's energy.
  • The input and output potential differences are not the same.
  • Transformers can either increase or decrease the input potential difference for the output.
  • A simple transformer consists of a solid iron core with two coils wound around opposing ends.
  • The two separate coils of wire carry the input and output currents and are wrapped around an iron core.
  • The iron core is used because it is easy to magnetize.
  • The primary coil carries the input alternating current.
  • The secondary coil carries the output alternating current with a different potential difference.
  • The coils are wound around the core a different number of times.
  • Familiarity with the primary and secondary coil terminology is important when studying transformers.

Please subscribe to access these revision notes.

This, and all other video notes, are included in our premium subscriptions.

Premium accounts get access to all videos and revision notes.