Math, asked by sana74271, 9 months ago

The resistance of an electric wire of an alloy is 10 ohm .if the thickness of the wire is0.001m, length is 1m find its resistivity

Answers

Answered by tanvivyas123456
1

Answer:

The given information are:

Resistance(R)=10Ω,

length(L)=1m,

Diameter=0.001m,

Radius (Diameter/2)=0.005m.

The area of the cross section of the wire is

 π r^2 Or, A = 3.14 x (0.005)^2 m^2 Or,

A = 0.0000785 m^2.

We know that, ρ= (R*A)/L.

Therefore,

ρ= (10Ω*0.0000785)sqm / 1m.

ρ=10Ω*0.0000785. ρ=0.000785Ωm.

Therefore, the resistance is 0.000785Ωm.

Step-by-step explanation:

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