Resistor schematic symbols of electrical & electronic circuit diagram - resistor, potentiometer, variable resistor.
 | Resistor (IEEE) | Resistor reduces the current flow. |
 | Resistor (IEC) |
 | Potentiometer (IEEE) | Adjustable resistor - has 3 terminals. |
 | Potentiometer (IEC) |
 | Variable Resistor / Rheostat (IEEE) | Adjustable resistor - has 2 terminals. |
 | Variable Resistor / Rheostat (IEC) |
 | Trimmer Resistor | Presest resistor |
 | Thermistor | Thermal resistor - change resistance when temperature changes |
 | Photoresistor / Light dependent resistor (LDR) | Changes resistance according to light |