What is electrical resistivity of a material what is unit describe an experiment to study the factors on which the resistance of conducting 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. A characteristic property of each material, resistivity is useful in comparing various materials on the basis of their ability to conduct electric currents.
What is meant by electrical resistivity of a material derive its SI unit describe an experiment?
Resistivity is defined as resistance of conductor with length 1m and having cross sectional area 1m², R=ρl/A. putting l=1m and A=1m². R=ρ this resistance is called resistivity. Resistance of a conductor depends on dimensions of the conductor(length and area) and resistivity.
What is electrical resistivity of a material class 10?
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 the effect of temperature on resistance of conductor?
The effect of temperature on the resistance of the conductor is directly proportional to each other. The increase in temperature of the conductor increases its resistance and makes it difficult to flow current through it.
What is resistivity in simple words?
Resistivity is the ability of a material to resist electrical conduction. The resistivity of a fluid-saturated rock is its ability to impede the flow of electric current through that rock.
What is electrical resistivity used for?
At the most basic level, electrical resistivity (ER) (as used in geophysics) is the measurement of ground variations gathered by applying a small and highly controlled electric current across an array of electrodes.
What is difference between resistance and resistivity?
Also, resistance is an aspect that opposes the flowing of free electrons. In contrast, resistivity is any material’s property that tells the resistance of the material with a particular dimension.
Difference between Resistance and Resistivity.
What is meant by electric current?
Electric current, any movement of electric charge carriers, such as subatomic charged particles (e.g., electrons having negative charge, protons having positive charge), ions (atoms that have lost or gained one or more electrons), or holes (electron deficiencies that may be thought of as positive particles).
How resistivity of a material depends on its conductivity?
Conductivity, σ is the reciprocal of the resistivity. That is 1/ρ and has the unit of siemens per metre, S/m. Conductivity ranges from zero (for a perfect insulator) to infinity (for a perfect conductor). Thus a super conductor has infinite conductance and virtually zero ohmic resistance.
What physical unit affects length thickness and type of material of wire?
(2) Thickness: the thickness of the wire will affect the resistance. The thicker the wire, the lower the resistance. (3) Material: the material the wire is made out of will affect the resistance. Different materials have different resistivities, which is the ability of the material to allow electrons to move.