Learn about current-voltage (IV) characteristics in this 27-minute physics revision video designed for Grade 9 GCSE students. Explore how current and voltage relate in different electrical components through detailed explanations and practical examples. Work through specific problems using the accompanying worksheet to reinforce your understanding of IV graphs and their interpretations. Master the fundamental concepts of electrical resistance, Ohm's law applications, and how different components like resistors, diodes, and filament bulbs behave in electrical circuits. Develop skills in analyzing and interpreting IV characteristic curves, understanding linear and non-linear relationships between current and voltage, and applying these concepts to solve GCSE-level physics problems.