Basic Electronics Knowledge (Resistance)
Resistance As its name implies, a resistor is an electronic component that resists the flow of electric current in a circuit. Electrical resistance is analogous to friction in a mechanical system. They both convert energy to heat and dissipate it to the surrounding environment, so electrical resistance can sometimes be thought of as a braking or damping mechanism in a circuit. Some Resistors In metals such as silver or copper, which have high electrical conductivity and therefore low resistivity, electrons are able to skip freely from the conduction band of one atom to the next, encountering little resistance. However, in a material such as carbon, electrons encounter numerous collisions that make it more difficult for them to move through the material, according to Serif Uran, a professor of physics at Pittsburg State University. Insulators such as glass have extremely high resistivity, with virtually no spaces in their conduction bands that would allow electrons ...
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