Varistor

What is a Varistor? A varistor is a voltage dependent resistor (VDR).…

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Electrolytic Capacitor

What are electrolytic capacitors? An electrolytic capacitor is a type…

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Triangle Of Power And Power Factor

In a purely resistive AC circuit, power is simply power. If we add…

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Varistor

What is a Varistor? A varistor is a voltage dependent resistor (VDR).…

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Capacitors in parallel

Capacitors, like other electrical elements, can be connected to other…

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Sinusoidal Steady State Power and Average Power

In this page, we will expand and reinforce our understanding of power…

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Coupling and Decoupling

Decoupling capacitors When designing a circuit, many novice engineers…

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Polymer Capacitor

What are polymer capacitors? Polymer capacitors are capacitors which…

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AC Power Analysis In Reactive Circuits

We already know that purely reactive components (or purely reactive…

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How To Calculate Power Factor Correction

As you now know, reactive components can cause a circuit’s power…

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Power Factor And RMS Explained

In the previous page, we saw that the mathematical representation of…

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Understanding Electrical Transformers

AC electrical systems make extensive use of transformers. A…

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Thermistor

What is a Thermistor? A thermistor is a temperature sensitive…

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Digital Potentiometer

What is a Digital Potentiometer? A digital potentiometer (also known…

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Resistors for LED Circuits

Resistors in Light Emitting Diode (LED) Circuits An LED (Light…

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Varistor

What is a Varistor? A varistor is a voltage dependent resistor (VDR).…

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Electric Charge

What is electric charge? Electric charge is a fundamental physical…

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Filter capacitor

Filter capacitors Capacitors are reactive elements, which make them…

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NTC Thermistor

What are NTC Thermistors? NTC stands for "Negative Temperature…

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Power Rating

What is the Power Rating of a Resistor? The power rating of a resistor…

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Metal Oxide Film Resistor

What are Metal Oxide Film Resistors? Metal-oxide film resistors are…

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Impedance and Reactance

Impedance and reactance An element in a DC circuit can be described…

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Capacitors in series

Capacitors in series Like other electrical elements, capacitors serve…

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About the Authors

Robert Keim Robert Keim graduated from the University of California,…

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Sinusoidal Steady State Power and Average Power

In this page, we will expand and reinforce our understanding of power…

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Resistors in Parallel

How to Calculate the Equivalent Resistance for Resistors in Parallel?…

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Fixed Resistor

What is a Fixed Resistor? Fixed value resistors have a defined ohmic…

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Film Capacitor

What are film capacitors? Film capacitors are capacitors which use a…

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Complex Numbers, Phasors And Phase Shift

The Effect of Phase We saw in the previous page that the voltage…

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Capacitance

What is capacitance? Electric capacitance is the ability of a…

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Metal Film Resistor

Metal Film Resistors Metal film resistors have a thin metal layer as…

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Ohm’s Law

What Is Ohm’s Law? Ohm’s law states that the electrical…

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