IB Physics: This Circuit Tricks Students (Series or Parallel?)

In this video, I break down a classic "trick" circuit problem that often appears in IB Physics and AP-Level exams. At first glance, these resistors appear to be in series, but a closer look at the wiring reveals a different story. We will calculate the total equivalent resistance ($R_{eq}$) by tracing the current and identifying the nodes. This is a must-know technique for solving complex resistor networks without guessing.In this lesson, you will learn:How to distinguish between series and parallel connections in messy diagrams.The "Node Method" for simplifying circuits.Step-by-step calculation for Equivalent Resistance.Common mistakes students make on this specific diagram. Relevance to Syllabus:IB Physics: Topic 5.2 (Heating Effect of Electric Currents) - Circuit Analysis AP Physics 2: Unit 4 (Electric Circuits) A-Level Physics: DC Circuits & Kirchhoff's Laws Timestamps: 0:00 - Series or Parallel? 0:13 - Tracing the Nodes 0:30 - Redrawing the Circuit 2:25 - Final Calculation 2:54 - Summary IB Physics, IBDP Physics, Topic 5 Electricity, Equivalent Resistance, Resistors in Series and Parallel, DC Circuits, Circuit Analysis, Physics Tutor, AP Physics 2, A Level Physics, Edexcel Physics, Cambridge Physics, Physics Problem Solving, Resistor Network, Electric Circuits Practice, High School Physics, Physics Exam Prep, Node Method Circuits.