Definitions for **"Resistivity"**

The electrical resistance per unit length of a unit cross-sectional area of a material, can be measured in geological materials.

The ratio of the applied voltage to the current

The resistivity R is the resistance of a unit cube with unit potential difference between a pair of faces. It varies over an immense range: from a little more than 1 in units of 10.m (which are the same as cm) for good conductors, to more than 10 24 in the same units, for the best insulators.

A physical property of a material to resist or oppose the movement of charge through the material. Expressed in ohm-cm.

The property of the bulk resistance of materials when reduced to a standard unit shape. The standard shape is taken as a 1 cm cube and the units of measurement are Ohm-cm. Useful in predicting the actual resistance of a thermistor when the resistivity is known along with its dimensions.

A remote sensing method capable of identifying solid sub-surface archaeological features by measuring the differences in their electrical resistance and that of the surrounding soils.

How hard it is for electricity to flow through something

geophysical exploration technique using electrical conductivity of rocks

a measure of how well current flows through a material, per unit length and cross-sectional area.

The electrical resistance that a meter cube of a substance (usually of packed dust) has when measured between opposite faces of the cube. The units are ohmmeters (or ohm-centimeters; a resistivity of 1 cm is equivalent to a resistivity of 100).

() The proportionality constant of a given material that relates the resistance to the length and cross-sectional area of the resistor. The unit of resistivity is the ohm-meter (-m) in the SI system.

the tendency to resist the flow of electricity RT rough terrain S-l personnel/administrative staff section S-2/S-3 security and operations staff section S-4 logistics staff section SAO Security Assistance Organization

Specific resistance. The property of a material which resists the flow of electrical current. The reciprocal of resistivity is conductivity. See ohm meter. See also apparent resistivity.

This is a measure of the electrical resistivity of the fluid and it must be kept high to prevent electrokinetic wear of servo-valve spools. Normally controlled by fuller's earth purification media. See also Electrokinetic Wear.

A capacity for resisting the flow of electricity. (See resistance.)

Measure of resistance to passage of electrical current (reciprocal of conductivity).

The ability of a material to resist passage of electric current through itself or on its surface.

The quantity determined by the temperature difference, at steady state, between two defined parallel surfaces of a homogeneous material of unit thickness, that induces a unit heat flow rate through a unit area (in m·K·W-1 or h·ft2·°F·Btu-1·in-1)..

The electrical resistance of a formation.

The resistance that a unit volume of a material offers to the passage of electricity, the electric current being perpendicular to two parallel faces. More generally, the volume resistivity is the ratio of the potential gradient parallel with the current in the material to the current density.

A measure of a particle's ability to conduct electricity (expressed in units of ohm-cm). Resistivity is very important in the efficient operation of electrostatic precipitators.

Is a fundamental physical property which depends only on the material. Gold has a very low resistivity.

The ability of a material to resist the passage of electrical current through it.

the resistance of a unit length of a conductor of unit cross sectional area (see Table 18.1)

The resistance of a conductor of length 1 m and of cross-sectional area 1 m2.

This is a complex relation of dopants, resistivity, and conductivity. It should be noted that resistivity can vary within a wafer, both in locations and directions. The resistivity can be different in the radial and axial directions in the wafer.

the reciprocal of electrical conductivity, and a measure of a material's resistance to the passage of electric current.

See SPECIFIC RESISTANCE. The reciprocal of conductivity.

The amount of difficulty that charged carriers have in moving throughout material.

See electrical resistivity.

a measurement of a formation’s resistance to electrical current used to determine whether the formation holds hydrocarbons or water.

The property of water to resist the flow of electricity; it is a measurement of that resistance and is the reverse of conductivity.

The strength with which the earth or a geological formation resists the flow of electricity, typically the flow induced by the primary field of the electromagnetic transmitter. Normally expressed in ohm-metres, it is the reciprocal of conductivity.

Referring to the measurment of the resistance of a material to electric current either through its volume or on its surface. The unit of volume resistivity is ohm-centimeter; the unit of surface resistivity is the ohm.

The geometry independent parameter of a material that determines the relationship between the current through it and the current across it. Resistance of a cylinder of material is: resistance = resistivity * (length / area)

The reciprocal of conductivity. Resistivity is usually corrected to 25 degrees centigrade and expressed as megohm-cm (MÎ©-cm).

A geophysical technique which measures the electrical resistivity between a set of spaced electrodes to generate a profile of subsurface geology.

The intrinsic property measured in ohm-cm that quantifies a materialâ€(tm)s opposition to free electron motion. Resistivity is the reciprocal property to conductivity.

Electrical resistance to the passage of a current, expressed in ohm-meters; the reciprocal of conductivity.

A proportionality factor characteristic of different substances equal to the resistance that a centimetre cube of the substance offers to the passage of electricity, the current being R = rL/A, where R is the resistance of a uniform conductor, L its length, A it cross-sectional area, and r its resistivity. Resistivity is usually expressed in ohm-centimetres. The ability of a material to resist passage of electrical current either through its bulk or on a surface.

A material's opposition to the flow of electric current, measured in ohms.

The ability of a material to resist passage of electrical current either through its bulk or on a surface. The unit of volume resistivity is the ohm-cm, of surface resistivity, the ohm.

(Also called specific resistance.) The electrical resistance per unit length and per unit reciprocal cross-sectional area of a given material at a specified temperature. It is also possible to define the resistivity of a substance as the resistance of a cube of that substance having edges of unit length, with the understanding that the current flows normal to opposite faces and is distributed uniformly over them. Resistivity is commonly expressed in units of ohm centimeters. The reciprocal of resistivity is conductivity.

Electrical resistivity (also known as specific electrical resistance) is a measure of how strongly a material opposes the flow of electric current. A low resistivity indicates a material that readily allows the movement of electrical charge. The SI unit of electrical resistivity is the ohm meter.