Calculate the resistance of a single core copper cable of 300m long 16mm² in cross section area. Take resistivity of copper 17.3*10^-9m?

Tifepraise

3 years ago

Resistance(R)=
A
ρl
​
where ρ is the resistivity
Here from the given question
l=3m A=1.7×10
−6
m
2

ρ=
l
RA
​

ρ=
3
(3×10
−2
)(1.7×10
−6
)
​
=1.7×10
−8
Ωm

Keeping the values we get the value of ρ=1.7×10
−8
Ωm