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    explain the construction and working of a hydrometer with diagram

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    Explain the construction and working of a hydrometer with diagram.

    Explain the construction and working of a hydrometer with diagram.

    Byju's Answer Standard IX Physics

    Hydrometer and Lactometer

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    Explain the construction and working of a hydrometer with diagram.

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    A direct-reading instrument used for measuring the density or relative density of the liquid is called hydrometer. Hydrometer is based on the principle of flotation, i.e., the weight of the liquid displaced by the immersed portion of the hydrometer is equal to the weight of the hydrometer.

    Hydrometer consists of a cylindrical stem having a spherical bulb at its lower end and a narrow tube at is upper end. The lower spherical bulb is partially filled with lead shots or mercury. This helps hydrometer to float or stand vertically in liquids. The narrow tube has markings so that relative density of a liquid can be read directly.

    The liquid to be tested is poured into the glass jar. The hydrometer is gently lowered in to the liquid until it floats freely. The reading against the level of liquid touching the tube gives the relative density of the liquid. Hydrometers may be calibrated for different uses such as lactometers for measuring the density (creaminess) of milk, saccharometer for measuring the density of sugar in a liquid and alcoholometer for measuring higher levels of alcohol in spirits.

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    Hydrometer and its Working

    Read formulas, definitions, laws from Hydrometer and Lactometer here. Click here to learn the concepts of Hydrometer and its Working from Physics

    Hydrometer and its Working

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    EXAMPLE

    Hydrometer- Principle of working

    Hydrometer is an instrument used to measure the relative density of a liquid (w.r.t. water). Its operation is based on Archimedes' Principle and Principle of flotation. It has several uses like:

    Lactometer (relative density of milk).

    Saccharometer (measuring density of sugar in a liquid).

    EXAMPLE

    Hydrometer- Construction

    A hydrometer is usually made of glass, and consists of a cylindrical stem and a bulb weighted with mercury or lead shot to make it float upright. The liquid to test is poured into a tall container, and the hydrometer is gently lowered into the liquid until it floats freely. The length of hydrometer submerged is a function of specific gravity. Hydrometers usually contain a scale inside the stem, so that the person using it can read specific gravity. A variety of scales exist for various applications.

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    Explain the construction and working of a hydrometer with diagram.

    Explain the construction and working of a hydrometer with diagram.

    Explain the construction and working of a hydrometer with diagram.

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