The Specific resistance of a material is theresistance offered by a one foot long wire of thematerial with a diameter of one MIL. There is a close relationshipbetween the resistance and specific resistance of thematerial. The resistance of a wire is directly proportionalto the specific resistance of the material..
Likewise, people ask, what is the specific resistance?
Specific Resistance is the inherent property of amaterial… It is defined as “ the resistanceoffered per unit length and unit cross sectional area of thatmaterial when a known quantity of voltage is applied at itsend”… Mathematically specific resistance isgiven by, p=(RA)/L.
Secondly, what is the resistance of a wire? To calculate the resistance R of a wire,we need to know three things: its length – the longer thewire, the greater its resistance. its cross-sectionalarea A – the greater the area, the less itsresistance. the resistivity of the material r – thegreater the resistivity, the greater itsresistance.
Considering this, what is specific resistance of conductor?
Conductor resistance increases with increasedlength and decreases with increased cross-sectional area, all otherfactors being equal. • Specific Resistance(”ρ”) is a property of any conductive material, afigure used to determine the end-to-end resistance of aconductor given length and area in this formula: R =ρl/A.
What is the specific resistance of copper wire?
Resistivity and Temperature Coefficient at 20 C
| Material | Resistivity ρ (ohm m) |
| Silver | 1.59 | x10-8 |
| Copper | 1.68 | x10-8 |
| Copper, annealed | 1.72 | x10-8 |
| Aluminum | 2.65 | x10-8 |
Related Question Answers
What is specific resistance and its unit?
Specific resistance is defined as “ theresistance offered per unit length and unitcross sectional area of that material when a known quantity ofvoltage is applied at its end” That's why SIUNIT OF SPECIFIC RESISTANCE IS Ohm-m.What is the other name of specific resistance?
Specific electrical resistance is alsoknown as electric resistivity is a property of materialdefining how strongly can the material oppose the flow of electriccurrent. SI unit of electrical resistivity is ohm-metre andis represented as ?.What is the SI unit of resistance?
The ohm (symbol: Ω) is the SIderived unit of electrical resistance, named afterGerman physicist Georg Simon Ohm.What is specific resistance write its SI unit?
It is the resistance offered perunit length and per unit cross section area of thatmaterial when a known quantity of voltage is applied at it'sends. It's S.I. unit is ohm-meter.What is the SI unit of resistivity?
The SI unit of electrical resistivity isthe ohm⋅metre (Ω⋅m). It is commonly represented bythe Greek letter ρ, rho. Although the SI resistivityunit, the ohms metre is generally used, sometimes figures willbe seen described in terms of ohms centimetres,Ω⋅cm.How do you find the specific resistance?
A measure of the potential electrical resistanceof a conductive material. It is determined experimentally using theequation ρ = RA/l, where R is the measured resistance ofsome length of the material, A is its cross-sectional area (whichmust be uniform), and l is its length. It is measured inohm-meters.What is Ohm's law used for?
Ohm's Law is a formula used to calculatethe relationship between voltage, current and resistance in anelectrical circuit. To students of electronics, Ohm's Law (E= IR) is as fundamentally important as Einstein's Relativityequation (E = mc²) is to physicists.What is Ohm's law formula?
Ohm's Law Formula Voltage= Current× Resistance. V= I×R. V=voltage, I= current and R= resistance. The SI unit of resistance isohms and is denoted by Ω This law is one of themost basic laws of electricity.What is Ohm's law in electricity?
Ohm's law states that the current through aconductor between two points is directly proportional to thevoltage across the two points. More specifically, Ohm's lawstates that the R in this relation is constant, independent of thecurrent.What is difference between resistance and specific resistance?
The resistance is the ratio of the length andcross-section area of the conductor, whereas the resistivity of thematerial is the ratio of the product of the resistance andarea to the length of the conductor. The resistance isrepresented by the symbol R whereas the resistivity is representedby the symbol ρ.How is voltage defined?
Voltage, also called electromotive force, is aquantitative expression of the potential difference in chargebetween two points in an electrical field.What is resistance explain?
Resistance is the opposition that a substanceoffers to the flow of electric current. When an electric current ofone ampere passes through a component across which a potentialdifference (voltage) of one volt exists, then the resistanceof that component is one ohm.On what factors specific resistance depends?
Specific resistance or resistivity dependsupon the temperature of the conductor and the nature of thematerial the conductor is made up of.How does resistance vary with temperature?
The more the atoms jostle around in the material, themore collisions are caused and hence the greater theresistance to current flow. In a material where theresistance INCREASES with an increase intemperature, the material is said to have a POSITIVETEMPERATURE COEFFICIENT.What is the unit of conductance?
The siemens (symbolized S) is the Standard International(SI) unit of electrical conductance. The archaic termfor this unit is the mho (ohm spelledbackwards).What is the unit of specific conductance?
Conductivity (or specific conductance) of anelectrolyte solution is a measure of its ability to conductelectricity. The SI unit of conductivity is siemens permeter (S/m).What is meant by dark resistance?
So dark resistance as specified refers to theresistance that a photo-resistor exhibits when subjected tothe absence of light (usually higher resistance in the orderof 100Kohms and more) 681 views.What is conductivity formula?
As a reciprocal quantity, conductivity is ameasure of how easy a material permits the flow of current. Thisare related by: Resistivity = 1 / conductivity. Theequation is: ρ = 1 / σWhat causes resistance?
The moving electrons can collide with the ions in themetal. This makes it more difficult for the current to flow, andcauses resistance. The resistance of a long wire isgreater than the resistance of a short wire becauseelectrons collide with more ions as they pass through. 
