calculate the resistance of 2 kilometre long copper wire of radius 2 mm ( resistivity of copper = 1.72×10 to the power -8
Answers
Answered by
5
Answer:
2.74 Ω
Explanation:
Resistance = Resistivity × Length / Cross section area
= ρL/(πr²)
= [1.72 × 10⁻⁸ Ω m × 2 × 10³ m] / [3.14 × (2 × 10⁻³ m)²]
≈ 2.74 Ω
Answered by
0
Explanation:
Get the reference resistance from your question:
R=PI2=0.1W40⋅10−9A2=6.25⋅1013 ohms
Similar questions