A resistor is a passive two-terminal electrical component that implements electrical resistance within a circuit element. Resistors are available in fixed or variable types. Fixed resistors are the most commonly used resistors and are also one of the most used electronic components overall. Like many electronic components, resistors are available in various sizes, capacities, and types, and each has substantial differences in typical values for resistor noise, tolerances, wattage rating, temperature coefficient, voltage coefficient, frequency response, size, and reliability.
A fixed resistor is one whose resistance value is fixed and cannot be changed as it is set to a specific value meaning they do not change their resistance value with temperature, operating voltage or time. A variable resistor also known as a potentiometer can be adjusted from virtually zero ohms to a factory-determined value.
Fixed resistors will enable you to: