Question

Calculate the area of cross section of a wire if is length is 1.0m it's resistance is 2.3ohm and the resistivityof the material of the wire is 1.84×10–6ohm m​

Answer 1

Step-by-step explanation:

R=23Ω

l=1.0m

ρ=1.84×10

−6

Ωm

A=?

A=

R

ρl

∴A=

23

1.84×10

−6

×1

A=0.08×10

−6

m

2

=8.0×10

−8

m

2

Answer 2

Resistance R of a wire is given as: \frac{Kl}{A} }

Where, A is the area of cross-section of the wire l = Length of the wire = 1 m R = 23 Ω ρ = Resistivity of the wire = 1.84 × 10−6 Ωm Therefore, the area of cross-section of the wire is 8 ×10−8 m2