How Low Pass Filters Work using a Resistor and Inductor (RL)

If you'd like to understand how a low pass RL filter works, you have come to the right place. I show how they work using the falstad circuit simulator, and first giving a quick review on how inductors work.

By the end of this video you can see how taking the voltage across the resistor instead of across the inductor, we get basically the opposite effect as a high pass RL filter.

This same RL circuit that worked as a high pass filter in the previous video now works as a low pass filter, by taking the voltage across the other circuit element.

And this is true, basically, because KVL says the voltage drops across both need to add up to the source voltage, so if the voltage across one element is following the source well, the voltage across the other element isn't, and vice versa