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Byju's Answer

Standard VIII

Physics

Fundamental Units

A mercury bar...

Question

A mercury barometer reads h mm Hg with the temperature of the mercury at T $^{o} C$ . The barometer reading corrected for the standard temperature 0 $^{o} C$ with $β$ denoting the volumetric expansion coefficient of mercury in 0 $^{o} C$ , is

\frac{h}{1 + β T}

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h (β + T)

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h (1 + β T)

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h (β - T)

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Solution

The correct option is C $h (1 + β T)$
$The correction applied = h β T$

$∴ The reading of barometer = h + h β T$
$= h (1 + β T)$

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Similar questions

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A faulty barometer contains certain amount of air and saturated water vapour. It reads 74.0 cm when the atmospheric pressure is 76.0 cm of mercury and reads 72.10 cm when the atmospheric pressure is 74.0 cm of mercury. Saturation vapour pressure at the air temperature = 1.0 cm of mercury. Find the length of the barometer tube above the mercury level in the reservoir.

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A mercury barometer reads h mm Hg with the temperature of the mercury at ToC. The barometer reading corrected for the standard temperature 0oC with β denoting the volumetric expansion coefficient of mercury in 0oC, is

The correct option is C h(1+βT)The correction applied = h β T ∴The reading of barometer =h+h β T =h(1+βT)

A mercury barometer reads h mm Hg with the temperature of the mercury at T $^{o} C$ . The barometer reading corrected for the standard temperature 0 $^{o} C$ with $β$ denoting the volumetric expansion coefficient of mercury in 0 $^{o} C$ , is

The correct option is C $h (1 + β T)$
$The correction applied = h β T$

$∴ The reading of barometer = h + h β T$
$= h (1 + β T)$