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The resistance of platinum wire at 0@C i...

The resistance of platinum wire at `0@C` is `2Omega` and `6.8 Omega ` at `80@C` .The temperature coefficient of resistance of the wire is :

A

`3 times 10^(-3) "^@C^(-1)`

B

`3 times 10^(-2) "^@C^(-1)`

C

`3 times 10^(-1) "^@C^(-1)`

D

`3 times 10^(-4) "^@C^(-1)`

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