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The length of a metal rod at 0^(@)C is 0...

The length of a metal rod at `0^(@)C` is 0.5m. When it is heated, its length increases, by 2.7 mm.The final temperature of the rod is (coefficient of linear expansion of the metal `=90xx10^(-6)//^(@)C`)……………. .

A

`20^(@)C`

B

`30^(@)C`

C

`40^(@)C`

D

`60^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
d
`l_(t)=l_(0)(1+alphat)`
`therefore" "t=(l_(t)-l_(0))/(l_(0)alpha)=(2.7xx10^(-3))/(0.5xx90xx10^(-6)), t=60^(@)`
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FULL MARKS-HEAT AND THERMODYNAMICS-ADDITIONAL QUESTIONS SOLVED (I. Choose the correct answer from the following)
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  2. A metal sheet with a circular hole is heated. The hole will

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  5. When water is heated from 0^(@)C to 10^(@)C , its volume …………… .

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  6. A block of wood is floating on water at 0^(@)C with a certain volume '...

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  7. An iron tyre is to be fitted on a wooden wheel 0.1m in diameter. The m...

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  8. A Steel rod of length 25 cm has a cross - sectional area of 0.8cm^(2)....

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  9. Which of the following will make the volume of an ideal gas four times...

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  10. A perfect gas at 27^(@)C is heated at constant pressure so as to doubl...

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  11. An air bubble doubles in radius on rising from the bottom of a lake to...

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  12. The mass of 1 litre of helium under a pressure of 2 atm and at a tempe...

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  13. Pressure exerted by a perfect gas is equal to …………….. .

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  14. Two vessels A and B contain the same ideal gas. The volume of B is twi...

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  15. According to Boyle's law, PV=C when the temperature of the gas remains...

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  16. The pressure of a gas contained in a closed vessel is increased by 0.4...

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  17. A difference of temperature of 25°C is equivalent to a difference of

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  18. A temperature at which both the Fahrenheit and the centigrade scales h...

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  19. If the temperature of patient is 40^(@)C, his temperature on the Fahre...

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  20. The correct value of 0^(@)C on the Kelvin scale is ……………..

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