Basic DC Circuit Theory

Voltage and Current Relationship The earth is a dynamic place. Objects…

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Potentiometer Taper

What is Potentiometer Taper? Potentiometer taper is the relation…

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Resistor Noise

What is Resistor Noise? Noise is an unwanted phenomenon for resistors.…

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Current limiting

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Standard Resistor Power Ratings

An electrical device’s power rating provides a general idea of…

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Temperature Coefficient of Resistance

Resistance Changes with Temperature The temperature coefficient of…

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Power Factor And RMS Explained

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

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Potentiometer

What is a Potentiometer? A potentiometer is a manually adjustable…

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Electric Charge

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

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Dielectric Materials

Dielectric materials Dielectric materials are essentially insulators,…

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Polymer Capacitor

What are polymer capacitors? Polymer capacitors are capacitors which…

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Supercapacitor

What are supercapacitors? Supercapacitors are electronic devices which…

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Fixed Resistor

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

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Capacitor Guide Intro

Welcome to the Capacitor Guide! Your guide in the world of capacitors.…

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Capacitance

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

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Resistors for LED Circuits

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

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PTC Thermistor

What are PTC Thermistors? PTC stands for "Positive Temperature…

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Understanding Electrical Transformers

AC electrical systems make extensive use of transformers. A…

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Motor starting capacitor

Motor capacitors AC induction motors use a rotating magnetic field to…

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NTC Thermistor

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

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Photoresistor

What are Photoresistors? Photoresistors, also known as light dependent…

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About the Authors

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

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Trimmer Capacitor

What are trimmer capacitors? Trimmer capacitors are variable…

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Foil Resistor

What is a Foil Resistor? The metal foil resistor has the best…

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Power Factor And RMS Explained

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

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Resistor Color Code

How Does the Resistor Color Code Work? Check out the All About…

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PTC Thermistor

What are PTC Thermistors? PTC stands for "Positive Temperature…

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Resistor Noise

What is Resistor Noise? Noise is an unwanted phenomenon for resistors.…

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Resistors in Series

How to Calculate the Equivalent Resistance For Resistors in Series?…

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Carbon Composition Resistor

An Introduction to Carbon Composition Resistors Carbon composition…

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Capacitors in parallel

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

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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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Polymer Capacitor

What are polymer capacitors? Polymer capacitors are capacitors which…

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Resistance of a Resistor

Resistance of a Resistor The function of a resistor is to oppose the…

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NTC Thermistor

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

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Understanding Electrical Transformers

AC electrical systems make extensive use of transformers. A…

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Potentiometer

What is a Potentiometer? A potentiometer is a manually adjustable…

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Air Capacitor

What are air capacitors? Air capacitors are capacitors which use air…

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Heater Resistor

What are Heater Resistors? Heater resistors are used whenever an…

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AC Power Analysis In Reactive Circuits

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

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