Question

calculate the area of cross section of a wire if its length is 1 metre resistance is 20 ohm and resistivity is 1.84 into 10 raise to power minus 6 ohm metre​

Answer 1

Explanation:

we know R = (rho)(l)/ (A)

and given R= 20 ohm

rho= 1.84x10^(-6)

l=1m

Putting values we get

A=(rho)(l)/R

A=9.2x10^-3 cm^2