Electrical Engineering › Section F · Network theorems (dc) › Topic F.1

The superposition theorem

When a circuit has several sources, you can find the effect of each one on its own and simply add the results. Superposition turns one hard problem into several easy ones, and it shows how much of every current each source is responsible for.

In this topic

  • From methods to theorems
  • Linearity
  • The superposition theorem
  • Switching the other sources off
  • The method step by step
  • Worked example: two voltage sources
  • Worked example: a voltage and a current source
  • Power does not superpose
  • When superposition is the right tool
  • Common mistakes to avoid
  • Key takeaways

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