What is meant by resistivity ?

Question

I want to know the concept of resistivity and also that what is the difference between resitance and restivity.

Answer 1

resisitivity of a material is defined as the resistance of its specimen of unit length and unit area of cross section
resistance is the property of opposing free flow of electrons.it is measured in ohms.resistivity is the electrical property. it is measured in ohm-metres.
R, resistance=p*l/A
where r is resistance of the body and p is the specific resistance

Answer 2

Resistivity is how well or how strongly some material opposes the flow of electricity.
Resistance is the degree to which an object opposes an electric current through it.
Resistivity is equal to resistance times the cross sectional area of the object divided by the length of the object

Answer 3

Resistivity is defined as resistance of the material per unit area and length of cross section

Answer 4

1.The electrical Resistance of a cube of one meter on the side is known as the resistivity of a material
2. Resistance of a material is the product of its resistivity and length in meters divided by its section in m^2.
3. Free electrons in metals and charge carriers in semiconductors can flow in closed circuits under the influence of an electric field.
Since there are are no free electrons in insulators, there cannot be a current flow. Insulators have very high electrical resistivity. Among metals, silver has the least resistivity.

Answer 5

Resistivity is the property of the material of a conductor which is the resistance offered by the conductor of unit length and unit cross sectional area at a given temperature.

Thus, if ρ denotes the resistivity of the material of conductor in ohm-m (Ω-m) at some temperature, then the resistance, R, of the conductor at that temperature having length l and cross-sectional area A is given by

R = ρ ( l / A ) ohm (Ω)

Answer 6

A measure of the resisting power of a specified material to the flow of an electric current.

Answer 7

Resistivity is the Resistance Offered by the conductor of unit length and unit area of cross section.
1-SI unit-ohm meter
2-it only depends on the nature of the material.
3-it does not changes as the change in the length and the change in area of the cross section.

Answer 8

Resistivity is related to Ohm's law.
Ohm's Law states that the current density in a circuit is directily proportional to the electric field. The proportionality constant is called =conductivity constant . It has the dimension of per seconds= 1 /seconds.
The conductivity constant relates how much current can flow per unit area per unit quantity of electric field . Therefore its indicative of what the conductance electricity is in an electric circuit

The formula for conductance is amount of current per unit voltage. Or Power per unit electromotive force.It is measured in Siemens and has the dimensions of meters per seconds.

Resistivity is the inverse of conductivity. It indicates how much force(resistance)on an area of a conductor is encountered in the circuit. It is measured as ohms-meters which has the dimension of seconds.

The formula for resistance is the amount of electromotive force per unit current. It is measured in ohms and has the dimensions of seconds per meter.

note ; Resistivity has dimensions of seconds and resistance has dimensions of seconds per meter.
That means resitivity has the dimension of Time.
Resitance has dimension of inverse Velocity.

Since Resitivity is a unit of time and if voltage(electromotive force) would travel at relativistic speed a time dilation would occur =that means a resistivity dilation.

So Power of the current in a circuit is =Electromotive force times velocity of the voltage. I =V/R

Answer 9

resistance is the obstruction to the flow of electrons
resistivity is the property of the material which describes its resistance

its like "tall" and "height" ...where tall=resistance ...
height = resistivity

Answer 10

sister resistance to activity.