Question: What Is A Specific Resistance?

What is the reciprocal of specific resistance?

The reciprocal of resistance is conductance..

How do you find the resistance of a cable?

The electrical resistance, R of this simple conductor is a function of its length, L and the conductors area, A. Ohms law tells us that for a given resistance R, the current flowing through the conductor is proportional to the applied voltage as I = V/R.

What is Ohm’s law define specific resistance?

Ohm’s Law and Resistance. Ohm’s law states that the voltage or potential difference between two points is directly proportional to the current or electricity passing through the resistance, and directly proportional to the resistance of the circuit. The formula for Ohm’s law is V=IR.

What is the relationship between resistance and resistivity?

The resistance of a cylindrical segment of a conductor is equal to the resistivity of the material times the length divided by the area: R≡VI=ρLA. The unit of resistance is the ohm, Ω. For a given voltage, the higher the resistance, the lower the current.

What is the formula for specific resistance?

Specific Resistance (”ρ”) is a property of any conductive material, a figure used to determine the end-to-end resistance of a conductor given length and area in this formula: R = ρl/A. Specific resistance for materials are given in units of Ω-cmil/ft or Ω-meters (metric).

What does specific resistance depend on?

The specific resistance of a wire depends on the temperature and on the material that is used in the wire.

What is meant by 1 ohm?

ohm. [ ōm ] The SI derived unit used to measure the electrical resistance of a material or an electrical device. One ohm is equal to the resistance of a conductor through which a current of one ampere flows when a potential difference of one volt is applied to it.

How do you determine the resistance of a wire?

To calculate the resistance R of a wire, we need to know three things:its length – the longer the wire, the greater its resistance.its cross-sectional area A – the greater the area, the less its resistance.the resistivity of the material r – the greater the resistivity, the greater its resistance.

What is the unit of specific resistivity?

ohm-meterThe SI unit of electrical resistivity is the ohm-meter (Ω⋅m). For example, if a 1 m × 1 m × 1 m solid cube of material has sheet contacts on two opposite faces, and the resistance between these contacts is 1 Ω, then the resistivity of the material is 1 Ω⋅m.

What is the effective resistance?

the resistance to an alternating current, expressed as the ratio of the power dissipated to the square of the effective current.

What is specific resistance and its unit?

Specific resistance is defined as the resistance offered by a unit length and unit cross-section of the substance to a current when a voltage is applied to it. Its SI unit is Ω−m.

What is the other name of specific resistance?

Specific electrical resistance (also known as electric resistivity)

What is specific resistance of a wire?

The Specific Resistance (K) of a material is the resistance offered by a wire of the material which is one foot long with a diameter of one MIL. The resistance of a wire is directly proportional to the specific resistance of the material.

What is resistivity easy words?

Resistivity, electrical resistance of a conductor of unit cross-sectional area and unit length. … A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents. High resistivity designates poor conductors.

What is specific resistance or resistivity?

The resistivity is also known as specific resistance. The resistivity represents the resistance of the material which has specific dimensions, i.e., the material has 1-meter length and 1 square meter area of cross section. … The resistivity is directly proportional to the temperature of the material.