The resistivity of iron is 1 xx 10^(-7) ...

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

Text Solution

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The correct Answer is:

A

Resistivity does not depend on length & cross section area.

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