This introduction covers The Narrow Pipe Problem within Resistance & Ohm's Law for GCSE Physics. Revise Resistance & Ohm's Law in Electricity for GCSE Physics with 14 exam-style questions and 30 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 1 of 16 in this topic. Use this introduction to connect the idea to the wider topic before moving on to questions and flashcards.
Topic position
Section 1 of 16
Practice
14 questions
Recall
30 flashcards
🔌 The Narrow Pipe Problem
Imagine trying to push water through different pipes. A wide, smooth pipe offers little resistance — water flows easily. A narrow, rough pipe resists the flow — you need more pressure to push the same amount through. Electrical resistance works the same way. A thick copper wire has low resistance; a thin nichrome wire has high resistance. The equation V = IR tells you that for a given voltage, higher resistance means less current can flow.