and cross sectional area is 1m²,then resistance of conductor is called resistivity. put l=1m and A=1m². this resistance is called resistivity. resistance of a conductor depends on dimensions of the conductor(volume ,length,area).
What is meant by electrical resistivity of a material derive its SI unit state the factors on which the resistance of a conducting wire depends?
Resistivity is defined as the electrical resistance of a conductor of unit cross-sectional area and unit length. The resistance of any conductor is directly proportional to the length of the conductor and inversely proportional to the area of cross-section of the conductor. SI unit of resistivity is ohm-meters.
What is meant by electrical resistivity of a material and derive its SI unit?
The electrical resistivity is the electrical resistance per unit length and per unit of cross-sectional area at a specified temperature. The SI unit of electrical resistivity is the ohm⋅metre (Ω⋅m).
What is meant by electrical resistivity of a material name the factors on which the resistance of a wire depends?
If I is the length of the conductor, A its area of the crosssection and R its total resistance then, Where P is a constant of proportionality and is called the electrical resistivity of the material of the conductor. The SI unit of resistivity is Ohm meter.
What is meant by electrical resistivity?
resistivity, electrical resistance of a conductor of unit cross-sectional area and unit length. … Resistivity, commonly symbolized by the Greek letter rho, ρ, is quantitatively equal to the resistance R of a specimen such as a wire, multiplied by its cross-sectional area A, and divided by its length l; ρ = RA/l.
What is meant by electrical resistivity of a material derive it’s SI unit if the length of a material is doubled what will be the change in its resistivity?
Electrical resistivity of the material of a conductor is the resistance offered by the conductor of length 1 m and area of cross-section 1 m2. Resistance of wire is doubled if its length is doubled. Hence current is reduced to half.
What is electrical resistivity derive an expression for the resistance of a metallic wire in terms of resistivity?
(a) The resistance of a metallic wire in terms of resistivity is given as: R=Aρl. Here, ρ is the resistivity of wire, l is the length, A is the area of cross-section and R is the resistance of wire. (b) I=2m. A=1.
What is the electrical resistivity of the material of the conductor?
Thus, electrical resistivity of a material of a conductor is defined as the resistance offered by unit length and unit cross-sectional area of a wire of the given material.