The resistance of a 5m uniform wire of cross-sectional area 0.2 x 10-6m2 is 0.425. What is the resistivity of the material of the wire?
a
1.10 x 10-6\(\Omega\)m
b
4.25 x 10-6\(\Omega\)m
c
2.40 x 10-7\(\Omega\)m
d
1.70 x 10-8\(\Omega\)m
Explanation
Correct Option
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Discussions (13)
Rhauph5
5 years ago
Pls the formulae to the answer should be resistance * area
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Length
Slimmyqueen
2 years ago
resistance= resistivity × area/ length
R= 0.425×0.2×10^-6 /5
R=8.5×10^-8/5
R= 1.7×10^-8
