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A steel scale is to be prepared such tha...

A steel scale is to be prepared such that the millimeter intervals are to be accurate within `6 xx10^(-5)mm`. The maximum temperature variation form the temperature of calibration during the reading of the millimeter marks is `(alpha = 12 xx 10^(-6)//"^(@)C)`

A

`4.0^(@)C`

B

`4.5^(@)C`

C

`5.0^(@)C`

D

`5.5^(@)C`.

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaL= 6xx10^(-5) = Lalphatheta implies theta = (6xx10^(-5))/(1 xx 12 xx 10^(-6) =5^(@)C`
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ALLEN -GEOMETRICAL OPTICS-EXERCISE -01
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  8. A steel rod of length 1 m is heated from 25^@ "to" 75^@ C keeping its ...

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  9. A brass disc fits snugly in a hole in a steel plate. Should you heat o...

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  10. The variation of lengths of two moles rods A and B with change in temp...

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  11. A steel tape placed around the earth at the equator when the temperatu...

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  12. Bars of two different metals are bolted together , as shown in figure....

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  13. A metal rod A of length l(0) expands by Deltal when its temperature is...

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  14. The coefficient of linear expansion 'alpha' of a rod of length 2 m var...

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  15. The coefficient of linear expansion 'alpha' of the material of a rod o...

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  16. A clock with a metallic pendulum gains 6 seconds each day when the tem...

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  17. A steel scale measures the length of a copper rod as l(0) when both ar...

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  18. The coefficient of apparent expansion of a liquid when determined usin...

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  19. Three rods of the same dimensions have thermal conductivities 3k , 2k ...

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  20. A cup of tea cools from 80^(@)C to 60^(@)C in one minute. The ambient ...

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