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Volume of mercury in the bulb of a therm...

Volume of mercury in the bulb of a thermometer is `10^(-6)m^(3)`. Area of cross section of capillary tube is `2xx10^(-7)m^(2)`. If the temperature is raised by `100^(@)C`, the length of mercury column is `(gamma_(Hg)=18" "10^(-5)//""^(@)C)`

A

9 cm

B

9 mm

C

18 cm

D

5 cm

Text Solution

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The correct Answer is:
A
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Knowledge Check

  • Volume of mercury in the bulb of a thermo-meter is 10^(-6)m^(3) . Area of cross section of capillary tube is 2 xx 10^(-7) m^(2) . If the temperature is raised by 100°C, the length of mercury column is ( gamma_(Hg) = 18 xx 10^(-5)//""^(@) C)

    A
    9 cm
    B
    9 mm
    C
    18 cm
    D
    5 cm

  • The coefficient of real expension of mercury is 18 xx 10 ^(-5//@)C .The thermometer bulb has a volume of 10^(-6) m^(3) and cross- section of the steam is 0.002 cm^(2) . Assuming that the bulb is filled with mercury at 0^(@)C , the length of the mercury column at 100^(@)C will be

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  • A platinum sphere floats in mercury. Find the percentage change in the fraction of volume of sphere immersed in mercury when the temperature is raised by 80^(@) C (volume expansivity of mercury is 182 xx 10^(-6)//""^(@) C and linear expansivity of platinum is 9 xx 10^(-6)//""^(@) C respectively )

    A
    `1.24%`
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    C
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    D
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