A wire 1.0m long and with cross-sectional area, 2.0 x 10-7 m^2 has a resistance of 0.1Ω. Calculate the electrical conductivity of the wire

A. 2.0 x 10^7Ω−1m−1
B. 5.0 x 10^7Ω−1m−1
C. 2.0 x 10^8Ω−1m−1
D. 5.0 x 10^8Ω−1m−1

Correct Answer: Option B

B. 5.0 x 10^7Ω−1m−1

Explanation

K = 1/RA    =1/0.1×2×10^−7

=5×107