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Core ideas and Kirchhoff's laws

Core ideas and Kirchhoff's laws

Comparison of a series circuit with one current everywhere and a parallel circuit with equal potential difference across both branches

Series circuits have one path for charge, while parallel circuits give charge more than one path. That structural difference explains the big rules: current stays the same in series, while potential difference stays the same across parallel branches.

Series and parallel circuits Lesson

  1. A Level
  2. /Physics
  3. /Series and parallel circuits

Step-by-step lessons on OCR A A Level Physics Series and parallel circuits. Each one builds up to exam-style questions. Physics is one of the most mathematically demanding A Levels -- at least 40% of the marks across the three papers require maths skills at Level 2 (GCSE) standard or above, so build calculation and graph-handling fluency alongside the conceptual content from the start.

Lessons