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The electric resistance of a certain wir...

The electric resistance of a certain wire of ron is R. If its length and radius are both doubled, then

A

the resistance will be doubled and the specific resistance will be halved

B

the resistance will be halved and he secific resistance will remain unchanged

C

the resistance will be halved and the specfic resistance will be doubled.

D

the resistance and the specific will both remain unchanged.

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