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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` of iron `=11xx10.//^(@)C`)

A

`11xx10^(-6)` cm longer

B

`11xx10^(-6)` cm shorter

C

`11xx10^(-5)` cm shorte

D

`11xx10^(-5)` cm longer

Text Solution

Verified by Experts

The correct Answer is:
C
Chane is length, `Deltal=l_(o)alphaDeltaT=10xx11xx10^(-6)(19-20)`
`" "=-11xx10^(-5)` cm
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DC PANDEY-THERMOMETRY THERMAL EXPANSION AND KINETIC THEORY OF GASES-Check point 14.2
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  2. The ratio among coefficient of volume expansion, superficial expansion...

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  3. Bimetal strips are used for

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  4. The temperature of a physical pendulum, whose time period is T, is rai...

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  5. On heating a liquid having coefficient of volume expension alpha in a ...

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  6. ABCD is thin iron shet. A hole with radius r is made in it in the midd...

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  7. A beaker is completely filled with water at 4^(@)C. It will overflow i...

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  8. A bar of iron is 10 cm at 20^(@)C. At 19^(@)C it will be (alpha of iro...

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  9. A steel tape gives corrent measurement at 20^(@)C. A piece of wood is ...

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  10. Two rods of length l(1) and l(2) are made of material whose coefficien...

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  11. The radius of a ring is R and its coefficient of linear expansion is a...

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  12. If two rods of length L and 2L having coefficients of linear expansion...

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  13. A metal rod of silver at 0^(@)C is heated to 100^(@)C . It's length is...

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  14. A uniform metal rod is used as a bar pendulum. If the room temperature...

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  15. Two rods of different materials having coefficient of thermal expansio...

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  16. Coefficient of volume expansion of mercury is 0.18xx10^(-3)//.^(@)C. I...

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  17. A glass flask of volume 200cm^(3) is just filled with mercury at 20^(@...

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  18. Solids expand on heating because

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  19. The coefficient of linear expansion of crystal in one direction is alp...

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  20. A steel rod of diamerer 1 am is clamped firmly at each end when its te...

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