Carbon film resistors also is famous and widely used because of their reliability and low cost. These are formed by depositing a thin layer of carbon on an insulating substrate and cutting it into a spiral pattern to provide the desired resistance value. The nominal power of these resistors, being 1/2 watt, 1/4 watt, 1 watt etc., indicates the maximum power which may be dissipated without damaging them.
1/4 watt carbon film resistors: these are the most common and a good choice for general-purpose applications where low power dissipation is needed. They are small and commonly used in consumer electronic and hobby build projects.
1;2 w carbon film: are rated for much higher power and are sometimes used in more high power applications like audio amplifiers and power supplies.
They are rated for higher power than 0.125W 1/8W, — greater current and voltage before overheating. They typically find usage in power circuits, motor controls and other applications which require a higher power rating.
Carbon film resistors are inherently stable with good tolerance and low noise, making them suitable for many designs.
