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A bar of iron is 10 cm at 20^(@)C. At 19...

A bar of iron is 10 cm at `20^(@)C`. At `19^(@)C` it will be `(alpha_(Fe)=11xx10^(-6)//.^(@)C)`

A

`11 xx 10^(-6)` cm longer

B

`11 xx 10^(-6)` cm shorter

C

`11 xx 10^(-5)` cm shorter

D

`11 xx 10^(-5)` cm longer

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