GCSE Resistance

This PowerPoint covers most of the facts about electrical resistance that students need to know for their GCSEs, including: Ohm’s Law, how to calculate resistance using voltage and current, example questions, resistors in series and parallel, the concept of equivalent resistance, understanding resistance as resistance to the flow of electrons, LDRs and thermistors and how their resistance is affected by light and heat, using LDRs and thermistors in circuits and how they affect current.