PhysicsState whether the given statement is true or false.Mercury used as a barometer liquid.

State whether the given statement is true or false.


Mercury used as a barometer liquid.


  1. A
    True
  2. B
    False 

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    Solution:

    The given statement is true.
    Concept- A barometer is a device that measures the pressure in a system. It consists of an inverted glass tube suspended in a mercury bath. When air pushes down the surface of the mercury, it causes it to rise slightly inside the tube. The rise in mercury inside the tube will be larger as the pressure increases.
    The barometric liquid in a barometer is mercury. When employed as a measuring liquid in a barometer tube, mercury offers several advantages.
    Mercury is quite dense. As a result of this quality, when the pressure changes, the change in height of the mercury in the barometer tube is quite reasonable. Because of this feature of mercury, we can measure very high pressure using a barometer, however if we use a lower density material, the change in height with pressure will be quite large, making such an apparatus exceedingly difficult to create.
    Mercury, once again, is a gleaming metal that can be plainly spotted within the barometer tube for taking readings. Mercury's gleaming characteristic allows it to prominently emphasise its readings.
    In addition, mercury has a lower specific heat than other elements. Mercury is also an excellent heat conductor. As a result, if the temperature of the system changes, mercury can reach that temperature faster.
    Hence, the given statement is true.
     
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