From the course: Electronics Foundations: Basic Circuits
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L/R response
From the course: Electronics Foundations: Basic Circuits
L/R response
- [Instructor] I can use my oscilloscope to watch how the current through an inductor changes as it stores and releases energy. To demonstrate that, I'll use this simple circuit which consists of a resistor and an inductor in series with each other, connected to a voltage source through a switch. This is called an RL circuit because it's composed of only resistors, inductors and a voltage or current source to provide power. I'm interested in seeing how the current through the inductor changes but since my oscilloscope is only designed to measure the voltage between two points, I can't directly measure the current passing through a wire. Since the resistor and inductor are in series with each other, any current that passes through the inductor, will also pass through the resistor and the voltage across the resistor will be directly proportional to the current through it, due to Ohm's law. Therefore, by measuring…
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