Lesson Plan: Electromagnetic Induction in Generators Physics
This lesson plan includes the objectives, prerequisites, and exclusions of the lesson teaching students how to describe electromagnetic induction in devices such as generators and dynamos.
Objectives
Students will be able to
- identify the components of a slip ring generator,
- identify the components of a commutator generator,
- relate diagrams that show the motion of a slip ring or commutator generator to graphs of the potential difference produced by the generator against time,
- recognize that if the coil of a generator has more loops, the peak potential difference produced by the generator will be greater,
- distinguish between the graphs of potential difference against time for a slip ring generator and a commutator generator,
- recognize that the brushes of a slip ring generator and commutator generator will degrade over time and that a better design of generator is to move the permanent magnet, rather than the coil,
- recognize that slip ring generators produce alternating current,
- recognize that commutator generators produce rectified alternating current.
Prerequisites
Students should already be familiar with
- electromagnetic induction,
- solenoids.
Exclusions
Students will not cover
- phased signals,
- transformers,
- alternating current circuits.