Electronic components

Fixed resistors 

• They impede the flow of electric current
• There is a colour code to know their value

Variable resistors

• Potentiometer: A potentiometer is a three-terminal resistor with a sliding or rotating contact that forms an adjustable voltage divider.

• Thermistor: semiconductor type of resistor whose resistance is strongly dependent on temperature. They can be
  • Negative-temperature-coefficient (NTC):  thermistors have less resistance at higher temperatures

 

• • • Positive-temperature-coefficient (PTC): thermistors have more resistance at higher temperatures

• Light Dependent Resistors (LDR): passive component that decreases resistance with respect to receiving luminosity on the component's sensitive surface