The resistivity of iron is `1 xx 10^(-7) ohm-m` . The resistance of a iron wire of particular length and thickness is 1 ohm . If the length and the di
The resistivity of iron is `1 xx 10^(-7) ohm-m` . The resistance of a iron wire of particular length and thickness is 1 ohm . If the length and the diameter of wire both are doubled, then the resistivity in ohm-m will be
A. `1xx10^(-7)`
B. `2xx10^(-7)`
C. `4xx10^(-7)`
D. None of these
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