File:Electronic-Axial-Lead-Resistors-Array.png · Wikimedia Commons · See Wikimedia Commons

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resistor

Also known as resistors, electrical resistor, ohmic, resistive load

thumb|upright=1.2|right|Various resistor types of different shapes and sizes

AI overview

A resistor is an electronic component that limits or controls the flow of electric current through a circuit. Resistors are essential building blocks in electronics because they protect other components from damage, help create different voltage levels, and allow devices to function properly.

AI-generated from the Wikipedia summary — may contain errors.

Key facts

Electronic component.name: Resistor
Electronic component.image: Electronic-Axial-Lead-Resistors-Array.png
Electronic component.caption: An array of axial-lead resistors
Electronic component.type: Passive
Electronic component.working_principle: Electrical resistance
Electronic component.terminal_number: 2
Electronic component.symbol: 100px 100px
Electronic component.symbol_caption: ANSI and IEC symbols

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Wikidata facts

Image: 100 ohm SMD 1206 resistor.jpg

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Commons category: Resistors

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~56 min read

Article

44 sections

Contents

Electronic symbols and notation
Theory of operation
Ohm's law
Series and parallel resistors{{anchor|Series_and_parallel_circuits}}
Power dissipation
Nonideal properties
Fixed resistors
Lead arrangements
Carbon composition
Carbon pile
Carbon film
Printed carbon resistors
Thick and thin film
Metal film
Metal oxide film
Wire wound
Metal foil resistor
Ammeter shunts
Grid resistor
Special varieties
Variable resistors
Adjustable resistors
Potentiometers
Resistance decade boxes
Special devices
Measurement
Standards
Production resistors
Resistance standards
Resistor marking
Preferred values
SMT resistors
Precision resistor markings
{{anchor|3-char-resistor-marking-code}}EIA-96 marking
Industrial type designation
Common usage patterns
Current limiting
Voltage divider
Pull-down and pull-up resistors
Electrical and thermal noise
Failure modes
See also
References
External links

thumb|upright=1.2|right|Various resistor types of different shapes and sizes

A resistor is a passive two-terminal electronic component that implements electrical resistance as a circuit element. In electronic circuits, resistors are used to reduce current flow, adjust signal levels, to divide voltages, bias active elements, and terminate transmission lines, among other uses. High-power resistors that can dissipate many watts of electrical power as heat may be used as part of motor controls, in power distribution systems, or as test loads for generators. Fixed resistors have resistances that only change slightly with temperature, time or operating voltage. Variable resistors can be used to adjust circuit elements (such as a volume control or a lamp dimmer), or as sensing devices for heat, light, humidity, force, or chemical activity.