Question

If the resistance of a certain copper wire is 1 ohm then the resistance of a similar nichrome wire will be about????? (a) 25 ohm. ( b) 30ohm
(c) 60ohm. (d) 45 ohm

Answer 1

Answer:

mark me bro testing the settings for this

Answer 2

Given :

As we know that

R= ρ l/ A

Resistivity of copper = 1.7 x 10 ⁻⁸ Ω m

Resistivity of Nichrome =1.1 x 10⁻⁶ Ω m

Resistance of coppe wire = 1 ohm

R= ρ l/ A

R/ ρ  = l/A

l/A= 1/  1.7 x 10 ⁻⁸   =58.82x 10 ⁶

as option c is the nearest to resistivity so the answer is option c that is  60 ohm