Resistance Values
Definition
A resistance value is a measure of the electrical resistance of a component, which limits the flow of current in an electrical circuit.
Types
There are different types of resistors:
- Film resistors (carbon film, metal film, metal oxide film)
- Wirewound resistors
- Bulk resistors
- Foil resistors
- Potentiometers (variable resistors)
Materials
Resistors can be made from various materials:
- Carbon films
- Metal films
- Metal oxides
- Ceramics
- Metals such as manganin
Applications
Resistors are used in:
- Electronic circuits
- Current measurement (shunts)
- Energy dissipation (brake resistors)
- RF applications (carbon film resistors)
- Precision applications (metal film resistors)