Question

on what factor does the resistance of a conductor depends give the mathematical expression give the s i unit of resistivity

Answer 1

factors on which resistance of a conductor depends:-

1) length of material

R is directly proportional to length

2) area of material

area is inversely proportional to the resistance

3). temperature is directly proportional to the resistance

4) nature of materials

Answer 2

Answer:

The resistance depends upon resistivity of the material, length, temperature, and area of across -section. Mathematically, R=pl/A where p is the resistivity, is the length and A is area of across section. From above, p=RA/l=ohm *m2/m=ohm-metre.