In this video, electrical engineer Barron Stone breaks down impedance, a value that captures both the resistance and reactance of circuit components. Learn about the inverse relationship between signal frequency and impedance in capacitors and why capacit
- [Instructor] Electronic components that oppose a change…in voltage or current are called reactive components.…For example, capacitors are reactive components…that oppose a change in voltage by absorbing…and releasing stored charge to counteract that change.…This opposition to change is called reactance,…which is abbreviated with a capital X…and is measured in units of ohms,…just like electrical resistance.…And in many ways reactance is similar to resistance…because they both describe how an electronic component…restricts the flow of current.…
However, there is an important distinction…between those two concepts.…Resistance describes how an electronic component…opposes the flow of current regardless of whether…the voltage across it is AC or DC.…The current through a resistive component will only depend…on the voltage at that moment in time…according to Ohm's law.…Reactance, on the other hand, describes how an electronic…component opposes voltage or current that changes over time…and the amount of opposition is proportional…
- Reading electrical schematics
- Building circuits on breadboards
- Reviewing types of static and variable resistors
- Reading resistor color codes
- Measuring resistance with a DMM
- Measuring resistive sensors with an Arduino microcontroller
- Making electrical signal measurements with an oscilloscope
- Measuring AC voltage with a DMM
- Understanding the time domain and frequency domain
- Designing passive low-pass and high-pass filters
- Reviewing reactive RC and RL circuits
- The relationship between capacitors and inductors
Skill Level Beginner
Learning to use MakerBot 3D Printerswith Kacie Hultgren1h 5m Appropriate for all
Learning Arduino: Pulse Width Modulationwith Rae Hoyt1h 16m Intermediate
1. Building Circuits
Read electrical schematics6m 25s
3. Resistive Circuits
4. Oscilloscope Measurements
6. Alternating Current
7. Electrical Signals
8. Reactive Circuits
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