Varistor

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

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Thermistor

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

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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 Values

Standard Resistor Values In 1952, the IEC (International…

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Resistor SMD Code

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

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Shunt Resistor

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

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Variable Resistor

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

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NTC Thermistor

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

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Blower Resistor

What is a Blower Resistor? Blower resistors are resistors which are…

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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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Capacitance

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

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Resistor Books and Online Resources

On this page you will find a collection of valuable books and other…

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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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Resistor Noise

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

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Filter capacitor

Filter capacitors Capacitors are reactive elements, which make them…

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Rheostat

What is a Rheostat? A rheostat is a variable resistor which is used to…

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Variable Resistor

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

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Resistors for LED Circuits

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

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Understanding Electrical Transformers

AC electrical systems make extensive use of transformers. A…

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Wirewound Resistor

What is a Wirewound Resistor? A wirewound resistor is an electrical…

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Photoresistor

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

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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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Impedance and Reactance

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

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Ceramic Capacitor

What are ceramic capacitors? A ceramic capacitor uses a ceramic…

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Carbon Composition Resistor

An Introduction to Carbon Composition Resistors Carbon composition…

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Parallel resistor calculator

Use this calculator to quickly calculate the equivalent resistance…

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PTC Thermistor

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

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Measurements In Electrical Engineering

Powers of Ten A numeral system is a method of using certain digits to…

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Resistor Sizes and Packages

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

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Dielectric Materials

Dielectric materials Dielectric materials are essentially insulators,…

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Kirchhoff’s Laws

Gustav Robert Kirchhoff   Kirchhoff's laws are essential for…

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Resistor Noise

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

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Metal Film Resistor

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

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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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Carbon Film Resistor

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

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Impedance and Reactance

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

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Metal Oxide Film Resistor

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

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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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Blower Resistor

What is a Blower Resistor? Blower resistors are resistors which are…

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Shunt Resistor

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

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Potentiometer Taper

What is Potentiometer Taper? Potentiometer taper is the relation…

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What Is Meant By Electrical Resistance?

Different materials react to voltage in different ways. If a material…

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Digital Potentiometer

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

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Q factor

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

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Tantalum Capacitor

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

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Potentiometer

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

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