Question

Calculate the resistance of a 1km length, 1mm diameter wire made from:

a) constantan (ρ = 4.9 × 10-7 Ωm)
b) copper (ρ = 1.7 × 10-8 Ωm)

c) State which material is better suited for being used to make resistors, and justify your answer.

i only need c part could any one help me please?

Answer 1

Answer:

yes

Explanation:

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Answer 2

Answer:

Constantan will be a better resistor because of the lower conductivity.