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A wire of length 60 cm is bent into a ci...

A wire of length 60 cm is bent into a circle with a gap of 1 cm at its ends. On heating it by `100^(@)C`, the length of the gap increases to 1.02 cm. `alpha` of material of wire is

A

`2xx10^(-4)//""^(@)C`

B

`4xx10^(-4)//""^(@)C`

C

`6xx10^(-4)//""^(@)C`

D

`1xx10^(-4)//""^(@)C`

Text Solution

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The correct Answer is:
A
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AAKASH SERIES-THERMAL PROPERTIES OF MATTER-EXERCISE-2
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  2. The ratio of the lengths of two rods is 4 : 3. The ratio of their coef...

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  3. A wire of length 60 cm is bent into a circle with a gap of 1 cm at its...

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  4. A metal metre scale gives correct measurement at 0^(@)C. It is general...

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  5. The temperature of a thin uniform rod increases by Deltat. If moment o...

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  6. A metal rod has a length of 1 m at 30^(@)C.'alpha' of metal is 2.5xx10...

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  7. Upon heating, the length of the side of a cube changes by 2%. The volu...

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  8. Radius of a sphere is 100 cm at 0^(@)C and 100.1 cm at 100^(@)C. Coeff...

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  9. A brass disc at 0^(@)C has a diameter of 50Cm and a hole of diameter 1...

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  10. Density of a substance at 0^(@)C is 10.6 gm/c.c and at 100^(@)C is 10 ...

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  11. A steel rod of dimesions 4xx4cm^(2) is tightly fixed between two suppo...

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  12. A length of 2m is measured using a metal tape at 10^(@)C. It is calibr...

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  13. A metal tape gives correct measurement at 15^(@)C. It is used to measu...

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  14. A piece of copper wire has a length of 2m at 10^(@)C. Its length at 10...

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  15. A piece of steel has a length of 30 cm at 15^(@)C. At 90^(@)C its leng...

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  16. The density of lead at 0^(@)C is 11.34g//cm^(3). The density of lead a...

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  17. A steel scale is correct at 0^(@)C. The length of a brass tube measure...

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  18. A clock , with a brass pendulum, keeps correct time at 20^(@)C, but lo...

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  19. A steel rod of length 1 m rests on a smooth horizontal base. If it is ...

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  20. A steel ball initially at a pressure of 1.0xx10^(5) Pa is heated from ...

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