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A steel meter scale is to be ruled so th...

A steel meter scale is to be ruled so that millimetre intervals are accurate within about `5xx10^-5` m at a certain temperature. The maximum temperture variation allowable during the ruling is (coefficient of linear expansion of steel =`10xx10^-6K^-1`

A

`2^(@) C`

B

`5^(@) C`

C

`7^(@) C`

D

`10^(@) C`

Text Solution

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The correct Answer is:
B
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