Resistor Symbols

A resistor is an electrical tool used to resist the electric current. It is used in a variety of electrical appliances to resist the extra amount of current. The physics and electronic illustrations & diagrams have different symbols to indicate different types of resistors. To illustrate these diagrams in soft forms you do require symbols of these resistors. The below table gives a complete set of symbols as well as a brief description of their features for different resistors.

Resistor symbols of electrical & electronic circuit diagram - resistor, potentiometer, variable resistor.

Table of resistor symbols

resistor symbol Resistor (IEEE) Resistor reduces the current flow.
resistor symbol Resistor (IEC)
potentiomemer symbol Potentiometer (IEEE) Adjustable resistor - has 3 terminals.
potentiometer symbol Potentiometer (IEC)
variable resistor symbol Variable Resistor / Rheostat (IEEE) Adjustable resistor - has 2 terminals.
variable resistor symbol Variable Resistor / Rheostat (IEC)
Trimmer Resistor Preset resistor
Thermistor Thermal resistor - change resistance when temperature changes
Photoresistor / Light dependent resistor (LDR) Photo-resistor - change resistance with light intensity change

Resistors & Their Symbols Offered Here

This table offers all types of resistors and their symbols. Here you can find IEC and IEEE resistors, both work to reduce the current flow in the circuit. IEEE & IEC potentiometers which are adjustable 3 terminal tools. Two terminal variable resistors. Special resistors like LDR( light depending resistor) and thermister. LDR depends on light to perform its resisting function while a thermistor is a temperature detecting resistor which starts opposing current when the temperature crosses a certain predefined limit. 


You can find symbols of all these resistors as well as information about their basic features and detailed descriptions. 

What is a buzzer symbol?

It is also a semi-circle. To include a motor in the circuit create a circle by drawing an M letter in its middle. A resistor, also known as a component, controls the flow of electric current across the circuit. Every circuit has switches so that the electricity flow can be switched off and then turned back on.

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