The electrical resistivity of a sample:

Question

The electrical resistivity of a sample: (A) is proportional to its length (B) is proportional to the area of cross-section (C) is inversely proportional to the length (D) is inversely proportional to the area of cross-section

Tardigrade Admin · Accepted Answer

The ratio of the intensity of the electric field (E) at any point within a conductor and the current density (J) at that point is called specific resistance or resistivity of the conductor ρ =(E/j) Specific resistance is the characteristic of the material of the conductor.

Q. The electrical resistivity of a sample:

is proportional to its length

is proportional to the area of cross-section

is inversely proportional to the length

is inversely proportional to the area of cross-section

neither depends on the length nor on the area of cross-section

The ratio of the intensity of the electric field $(E)$ at any point within a conductor and the current density $(J)$ at that point is called specific resistance or resistivity of the conductor $ρ = \frac{E}{j}$ Specific resistance is the characteristic of the material of the conductor.