September 2017
Intermediate to advanced
824 pages
22h 58m
English
Resistors for electronic and small electrical circuits are made from various materials such as carbon film or metal film (a thin layer covering a supporting body) mostly in a cylindrical form with two leads coming out from the two ends of the cylinder for connection to other parts in a circuit. They come in different values and with a few power values (the maximum power they can dissipate). Resistance values can be as small as a fraction of 1 Ω to large values such as 10 M Ω (10 million ohm). There are three issues in understanding how to select a resistor: tolerance, magnitude, and power.
The manufacturing process does not guarantee that a resistor has an exact value as desired. More ...