Question

state the factors on which the resistance of a metalic wire depends . define the term resistivity and derive its SI unit . a wir is of length 1m and radius 0.02cm has a resistance of 5ohms calculete the resistivity of material of the wire

Answer 1

resistance depends on resistivity, length and area. resistivity is a nature of a material to resist the flow of current and SI unit of resistivity is ohm-metre. and answer for numerical is 0.044ohm metres.

Answer 2

Answer:

resistance of the conductor depends

a) on its length

b) on its area of cross section

c) on the nature of material