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
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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})
Correct Answer: Option B
Explanation
K = (frac{1}{RA} = frac{1}{0.1 times 2 times 10^{-7}} = 5 times 10^7)