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AC and DC Motors

This section is part of the HSC Physic syllabus Module 6: Electromagnetism under Applications of the Motor Effect.

This post will cover the operation of simple DC and AC generators and AC induction motor.

Here are some helpful definitions for this post:

  • AC Generator: a device that produces a potential difference
  • DC Generator: a device that converts mechanical energy into direct current electricity
  • AC induction motor: a device that produces an alternating current.


AC and DC generators

Generators are used to generate and distribute electricity.


Induction Motors

Induction motor relies on Lenz’s Law.

Lenz’s Law states that a magnetic flux induces a voltage to oppose the initial change in magnetic flux.