Question

If the resistance of a certain copper wire is first than the resistance of a similar nichrome wire will be about

Answer 1

Answer:

At 20°C :

Copper resistivity = 1.75 x 10**-8 ——————————-> R = 1 Ohm

Ni 80 Cr 20 alloy resistivity = 1.05 x 10**-6 —————→ R = 60 Ohms

Ni 60 Cr 12 Fe 28 alloy resistivity = 1.20 x 10**-6 ———-> R = 68 Ohms

Ni 30 Al 65 Cr 5 alloy resistivity = 1.40 x 10**-6 ———→ R = 80 Ohms