An electronic color code is used to indicate the values or ratings of electronic components, usually for resistors, but also for capacitors, inductors, diodes and others. Electronic Engineering Resistor Dictionary, with terms and definitions for the Letter 'R', including graphics and drawings to assist the definition. V = R.I. Resistor definition, a device designed to introduce resistance into an electric circuit. Resistors are electronic components which have a specific, never-changing electrical resistance.The resistor's resistance limits the flow of electrons through a circuit.. In other words, the resistor tolerance is the amount by which the resistance of a resistor may vary from its stated value. Function of Resistors in Electronics. This is one of the basic components used in Emergency lighting, Medical Devices, Battery operated equipment, and many more applications. It may be a coil of fine wire or a composition rod. Resistor Basics. Resistors are nothing but hurdles and obstructions in the path […] You will work with a number of basic electronic components when building electronic circuits, including resistors, capacitors, diodes, transistors, and integrated circuits. Resistors A resistor is a component that resists the flow of current. A resistor is two terminal linear electronic device which is used to restrict electric current flow in a circuit. The power rating of any resistor is roughly proportional to its physical size. Different codes are used for wire leads on devices such as transformers or in building wiring. Most resistors found in small electronic devices such as portable radios are rated at 1/4 (0.25) watt or less. The tolerance of a resistor is the deviation that a resistor may vary from its nominal value resistance, measured at 25°C with no load applied. Is resistor an active or passive device? Definition of Variable Resistor. In the metric system, it is the unit of length equal to 39.37 inches. A separate code, the 25-pair color code, is used to identify wires in some telecommunications cables. See more. The word Resistor came from the property of resistance, which means to oppose current. Here is a brief overview of the functions of each of these basic electronic components. Resistor, this is a common electronic component seen in electronic circuits. It’s one of the most basic […] Resistor Tolerance. It is linear because it obeys Ohm’s law. Fixed resistor types. In electronic circuits, resistors play an important role to limit the current and provide only the required biasing to the vital active parts like the transistors and the ICs. They are passive components, meaning they only consume power (and can't generate it). It is applied in an electronic circuit for adjusting circuit resistance to control voltage or current of that circuit or part of that circuit. Resistor Tolerance. Here R is the constant of proportionality and is known as the resistance of the resistor. Resistor: A resistor is an electrical component with two terminals that is used to limit or regulate the flow of electrical current in electronic circuits. Its purpose is to reduce current flow as well as lower the voltage levels in its general vicinity or portion of the circuit. It is an electronic component. The electrical resistance is varied by sliding a wiper contact along a resistance track. Metal oxide resistor - A metal film resistor in which an oxide of metal (such as tin) is deposited as a film onto the substrate. Meter - Any electrical or electronic measuring device. Note in the first resistor photograph how the power ratings relate with size: the bigger the resistor… Resistor: The electrical component that offers resistance to the flow of current. 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