On what factor resistance of the substance depends (Laws of resistance)?

a. The resistance of the conductor is directly proportional to the length of the

conductor.

b. The resistance of the conductor is inversely proportional to the cross-section of

the conductor.

c. The resistance of the conductor depends on the nature of the material by which it

is made. That is specific resistance of the material.

d. The resistance of the conductor depends on its temperature.

The formula to find the resistance of the substance is below.

R = ρL/A  Ω

Where ρ is the constant for the material called its specific resistance or resistivity.

The unit of resistance is Ω

The unit of specific resistance is Ω/cm3, Ω/inch3, Ω/m3.