Capacitors & Inductors

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Electronics Components: What Is a Capacitor?

A capacitor is an electronic component that takes advantage of the ability of electric fields to reach out across an insulator. It consists of two flat plates made from a conducting material such as silver [more…]

Electronics Measurements: Capacitance

Capacitors are among the most useful of all electronic components. And capacitance is the term that refers to the ability of a capacitor to store charge. It's also the measurement used to indicate how [more…]

Electronics Components: How to Read Capacitance Values on a Capacitor

If there's enough room on the capacitor, most manufacturers of electronics components print the capacitance directly on the capacitor along with other information such as the working voltage and perhaps [more…]

Electronics Components: Sizes and Shapes of Capacitors

You'll find one or more capacitors in almost every electronic circuit you build. And capacitors come in all sorts of shapes and sizes, influenced mostly by three things: the type of material used to create [more…]

Electronics Components: Calculate Time Constants

Knowing exactly how much time it takes to charge a capacitor is one of the keys to using capacitors correctly in your electronic circuits, and you can get that information by calculating the RC time constant [more…]

Electronics Components: Capacitors in Parallel and Series

You can combine capacitors in series or parallel networks to create any capacitance value you need in an electronic circuit. For instance, if you combine three 100 μF capacitors in parallel, the total [more…]

Electronics Components: Put Capacitors to Work

If you're wondering what capacitors are actually used for in real-life electronic circuits, the following describes the most common ways that capacitors are used: [more…]

Electronics Projects: Charging and Discharging a Capacitor

One of the most common uses for capacitors in an electronic circuit is to store a charge that you can discharge when it's needed. Project 3-1 presents a simple construction project on a solderless breadboard [more…]

Electronics Projects: Block DC while Passing AC

One of the important features of capacitors in electronics circuits is their ability to block direct current while allowing alternating current to pass. [more…]

Electronics Components: Inductors and Inductance

An inductor is a coil that's designed for use in electronic circuits. Inductors take advantage of an important characteristic of coils called self inductance, [more…]

Electronics Measurement: Inductance and Henrys

Inductance is only a momentary thing. Exactly how much of a momentary thing depends on the amount of inductance an inductor has. Inductance is measured in units called [more…]

Electronics Measurement: Calculate RL Time Constants

The RL time constant indicates the amount of time that it takes to conduct 63.2% of the current that results from a voltage applied across an inductor. The value 63.2% derives from the calculus equations [more…]

Electronics Measurement: Calculate Inductive Reactance

Although inductors oppose changes in current in an electronic circuit, they don't oppose all changes equally. All inductors present more opposition to fast current changes than they do to slower changes [more…]

Electronics Components: Combine Inductors in Series or in Parallel

Just like resistors or capacitors, you can combine inductors in series or parallel within an electronic circuit. Then you can use simple equations to calculate the total inductance of the circuit. Note [more…]

Electronics Components: Put Inductors to Work

If you have been wondering what inductors are actually used for in real-life electronic circuits, here are a few of the more common uses for inductors: [more…]

Generalize Impedance to Expand Ohm’s Law to Capacitors and Inductors

Use the concept of impedance to gernalize Ohm’s law in phasor form so you can apply and extend the law to capacitors and inductors. After describing impedance, you use phasor diagrams to show the phase [more…]

Describe Circuit Inductors and Compute Their Magnetic Energy Storage

In circuits, inductors resist instantaneous changes in current and store magnetic energy. Inductors are electromagnetic devices that find heavy use in radiofrequency [more…]

Calculate the Total Capacitance for Parallel and Series Capacitors

Capacitors store energy for later use. The capacitance is the ratio between the amount of charge stored in the capacitor and the applied voltage. Capacitance is measured in [more…]

Find the Power and Energy of a Capacitor

Capacitors store energy for later use. The instantaneous power of a capacitor is the product of its instantaneous voltage and instantaneous current. To find the instantaneous power of the capacitor, you [more…]

Relate the Current and Voltage of a Capacitor

Capacitors store energy for later use. The voltage and current of a capacitor are related. The relationship between a capacitor’s voltage and current define its capacitance and its power. To see how the [more…]

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