Question

Q/-Calculate the resistance of 1 m long copper wire of radius 1 mm. Resistivity of the copper is 1.72 x 10-8 m

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Answer 1

Step-by-step explanation:

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Answer 2

Answer:

Resistivity of copper is 1.72 xx 10^-8 Omega m.

If R is the resistance of the given wire, then R=ρlA=(1.72×10-8Ωm)×(1000m)3. 14×10-6m2=5.48Ω.

So the calculation part starts,

Length=1 km=1000m

Radius=1 mm=1*10⁻³ m

Resistivity of copper=1.72x10⁻⁸

Resistance=(Resistivity of copper * Length)/(Area)

=(Resistivity of copper * Length)/(\piπ r²)

Resistance=[1.72*10⁻⁸*1000]/[22/7*(1*10⁻³)²

Resistance=5.5 ohm

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