Question

A copp
er wire of length 2m and areas
of cross section 1.7*10-6 meter 2 has a
resistence of 2*10*2ohms calculate the resistivity of copper?​

Answer 1

Hola User ___________

Here is Your Answer....!!!
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Actually welcome to the concept of the current electricity .....

So Basiclly we know that ....

R = p × l/A

So as given here .... R = 2 × 10^-2 ohm

l = 2m and A = 1.7 × 10^-6 m^2 ....

So we get that .... p (rho) = R A ÷ l

p = 2 × 10^-2 × 1.7 × 10 ^-6 ÷ 2

p = 1.7 × 10^-8

thus the resistivity is given as 1.7 x 10^-8 .... ohm - metre

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