Question

The resistance of a wire of length 80 cm and area. 025cm² is 1.5 ohm. calculate the specific resistance in Si units​

Answer 1

Answer:

Step-by-step explanation:

Answer 2

Hi,

Here is your answer

Given:

Resistance(R)=1.5Ω

Length(l)=80cm=0.8m

Area of cross section(A)=0.025cm²=2.5×10⁻⁶m²

To Find:

Specific resistance/Resistivity(ρ)

Solution:

Resistivity is given by the equation

ρ=RA/l

Substituting the given datas, we get,

ρ=1.5×2.5×10⁻⁶/0.8

ρ=4.6875×10⁻⁶Ωm

Notes:

1.Resistivity does not depend on area and length. It depends only upon nature of material and temperature.

2.The unit of resistivity is ohm-metre(Ωm)

Hope this helps you.