A wire 1.0m long and with cross-sectional area 2.0 x 10-7 m2 has a resistance of 0.1\(\Omega\). Calculate the electrical conductivity of the wire
A
2.0 x 107\(\Omega^{-1} m^{-1}\)
B
5.0 x 107\(\Omega^{-1} m^{-1}\)
C
2.0 x 108\(\Omega^{-1} m^{-1}\)
D
5.0 x 108\(\Omega^{-1} m^{-1}\)
Verified Correct Answer: B.
Physical Principles & Numerical Solution
K = \(\frac{L}{RA} = \frac{1}{0.1 \times 2 \times 10^{-7}} = 5 \times 10^7\)
Source: Myschool Past Questions Archive (Record #35092)