what is resistivity and what is resistance differentiate between the two - Physics - Electricity

Question

what is resistivity ? and what is resistance ? differentiate
between the two

Somnath physics · Accepted Answer

Resistance
is a measure of the opposition that a
circuit (or an electrical element) offers to the flow of electric
current Resistance is dependent on the
length and area of cross-section of the conductor
It is measured in Ohms, Ω Resistance of a
conductor changes with temperature

Resistivity
is the measure of a material’s ability to
oppose the flow of current Resistivity
of a conductor is a property of the material of
the conductor Unit of resistivity is Ohm meter, Ω
m Resistivity of the material of the conductor changes
with temperature

Example:

We say
resistance of the 1 meter long copper wire used in the circuit is 0
5 Ω, total resistance of the circuit is 1000
Ω

Resistivity
of copper is 1 7 × 10-8Ω m at room
temperature There is nothing called resistivity of a
circuit

Following
is the equation relating resistivity (ρ) and resistance (R) of
a conductor of length (L) and area (A)

Resistance will be numerically equal to resistivity when current
flows through a conductor of unit length having diameter equal to 1
m

Differences:

Resistivity
Resistance

1 It
is the measure of a material’s ability to oppose the flow of
current

1 It is a measure of the opposition that a circuit (or an
electrical element) offers to the flow of electric
current

2 It depends on the property of the material Its value is constant
for a particular range of temperature

2 Resistance of a conductor is directly proportional to its length
and inversely proportional to its area of cross-section

3 Unit
of resistivity is Ohm meter, Ω m

3 Unit of resistance is Ohm, Ω

Resistivity	Resistance
1. It is the measure of a material’s ability to oppose the flow of current.	1. It is a measure of the opposition that a circuit (or an electrical element) offers to the flow of electric current.
2. It depends on the property of the material. Its value is constant for a particular range of temperature.	2. Resistance of a conductor is directly proportional to its length and inversely proportional to its area of cross-section.
3. Unit of resistivity is Ohm meter, Ω m.	3. Unit of resistance is Ohm, Ω.

what is resistivity ? and what is resistance ? differentiate between the two..