Definition For Power Resistor

Types and construction wirewound resistors.

Definition for power resistor. Resistors are identified with the help of color codes. There are two types of resistors. The si unit of power is the watt where 1 watt 1 joule per second. As resistors are used in wide applications there values like power rating r value tolerance etc vary.

A power resistor works to dissipate voltage for instruments in some circuits that require a lower amount of energy than others. Back to our circuit. Resistor finds application in demodulator. In the field of electronics power dissipation is also a measurement parameter that quantifies the releasing of heat within a circuit due to inefficiencies.

This designation is loosely applied to resistors with power ratings of 1 watt or greater. Resistor definition and symbol a resistor is a passive electrical component with the primary function to limit the flow of electric current. The power rating may be as low as 1 10 watts and can be in several hundred watts. Acceptable tolerance levels range from 20 to as low as 001.

Linear resistor and non linear resistor. The international iec symbol is a rectangular shape. In electronics you ll encounter termination resistors when you re working with differential pair signals such as the rs 485. Resistors basically protect delicate elements within a.

Calculating the power dissipated by a resistor. In the usa the ansi standard is very common this is a zigzag line shown on the right. To use the power rule p i v we need to know both the current through the resistor and the voltage across the resistor. Definition of resistor a resistor is a passive element in a circuit that provides resistance to the flow of current.

Resistors of resistance value ranging from 1ohms to many mega ohms are manufatured. Found in virtually any electrical device that contains a controlled circuit board a power resistor is used to control the current that flows through a circuit. Resistors required to dissipate substantial amounts of power particularly used in power supplies power conversion circuits and power amplifiers are generally referred to as power resistors. A power resistor is a resistor designed and manufactured to dissipate large amounts of power in a compact physical package.

Finally then we have. By definition a termination resistor is a single resistor placed at the end of an electrical transmission line. 1 ampere 1 volt 1 watt.