Resistance and Resistivity: The length of a certain wire is kept same while its radius is doubled. What is the new resistivity of this wire?

A. It is increased by a factor of 2.
B. It is increased by a factor of 4.
C. It is reduced by a factor of 2.
D. It is reduced by a factor of 4.
E. It does not change.


Answer: E

Physics & Space Science

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