Variable Resistor

What is a Variable Resistor? A variable resistor is a resistor of…

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Shunt Resistor

Definition Shunt Resistor A shunt resistor is used to measure electric…

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Thermistor

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

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Varistor

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

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NTC Thermistor

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

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Resistor Values

Standard Resistor Values In 1952, the IEC (International…

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PTC Thermistor

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

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Basic DC Circuit Theory

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

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Resistor SMD Code

What are SMD Resistors?   SMD resistors on a printed circuit…

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About the Authors

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

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Motor starting capacitor

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

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Kirchhoff’s Laws

Gustav Robert Kirchhoff   Kirchhoff's laws are essential for…

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Resistors for LED Circuits

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

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Shunt Resistor

Definition Shunt Resistor A shunt resistor is used to measure electric…

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Resistor Noise

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

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Foil Resistor

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

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Film Capacitor

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

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Standard Resistor Power Ratings

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

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NTC Thermistor

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

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Metal Oxide Film Resistor

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

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Braking Resistor

What is a Braking Resistor? The property of resistors to dissipate…

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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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Supercapacitor

What are supercapacitors? Supercapacitors are electronic devices which…

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Capacitors in parallel

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

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Tantalum Capacitor

What are tantalum capacitors? Tantalum capacitors are a subtype of…

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Resistor Values

Standard Resistor Values In 1952, the IEC (International…

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Filter capacitor

Filter capacitors Capacitors are reactive elements, which make them…

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Basic DC Circuit Theory

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

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Resistor SMD Code

What are SMD Resistors?   SMD resistors on a printed circuit…

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Resistors for LED Circuits

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

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Tantalum Capacitor

What are tantalum capacitors? Tantalum capacitors are a subtype of…

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Resistor SMD Code

What are SMD Resistors?   SMD resistors on a printed circuit…

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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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Heater Resistor

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

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Resistor Noise

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

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Resistor Sizes and Packages

Resistors are available in a large number of different package styles…

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Metal Film Resistor

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

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Q factor

Q Factor definition The Q factor of a capacitor, also known as the…

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Shunt Resistor

Definition Shunt Resistor A shunt resistor is used to measure electric…

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Foil Resistor

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

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Basic DC Circuit Theory

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

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Carbon Film Resistor

What is a Carbon Film Resistor? Carbon film resistors are a type of…

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AC Power Analysis In Reactive Circuits

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

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Energy Storage

Capacitors used for energy storage Capacitors are devices which store…

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Fixed Resistor

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

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Air Capacitor

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

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Temperature Coefficient of Resistance

Resistance Changes with Temperature The temperature coefficient of…

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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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Carbon Composition Resistor

An Introduction to Carbon Composition Resistors Carbon composition…

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