Question

calcukate the resistance if copper wire of length 1m area of cross sectiinal 2m m2 resistivity of copper is 1.7*10-8

Answer 1

Answer:

Thus, the resistivity of copper is 1.7×10-8 ohm-metre.

Explanation:

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