Explain resistance of a wire and factors affecting its properties ?
Resistance wire is wire intended for making electrical resistors (which are used to control the amount of current in a circuit). It is better if the alloy used has a high resistivity since a shorter wire can then be used. In many situations, the stability of the resistor is of primary importance, and thus the alloy's temperature coefficient of resistivity and corrosion resistance plays a large part in material selection.
When resistance wire is used for heating elements (in electric heaters, toasters, and the like), high resistivity and oxidation resistance are important.
Sometimes resistance wire is insulated by ceramic powder and sheathed in a tube of another alloy. Such heating elements are used in electric ovens and water heaters and specialized forms for cooktops.
How to Calculate Resistance of a Wire?
Resistance of a Wire calculator uses resistance = Resistivity*Length/Cross sectional area to calculate the Resistance, The resistance of a wire is a measure of the opposition to current flow in an electrical circuit. Resistance is measured in ohms, symbolized by the Greek letter omega (Ω). Resistance and is denoted by R symbol.
How to calculate Resistance of a Wire using this online calculator? To use this online calculator for Resistance of a Wire, enter Resistivity (ρ), Length (l) and Cross sectional area (A) and hit the calculate button. Here is how the Resistance of a Wire calculation can be explained with given input values -> 5.100E-6 = 1.7E-05*3/10.