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The capillary tube in a thermometer is narrow to allow for precise measurements of temperature changes. A narrow diameter increases the sensitivity of the liquid inside the tube, enabling it to expand or contract more noticeably with small temperature fluctuations. This design ensures that even slight changes in temperature result in a clear, measurable movement of the liquid column, enhancing the accuracy of the readings. Additionally, the narrow tube helps minimize the effect of external factors, such as air currents, on the liquid's movement.
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What is a thermometer bore?
A bore refers to the extremely fine or narrow tube found in a thermometer. It is called a narrow bore or a capillary.
What is a capillary tube in instrumentation terms?
a thermometer--
Why does a mercury-in-glass laboratory thermometer have a narrow capillary bore?
The narrow capillary bore allows for more precise measurement of temperature changes because the mercury expands and contracts more readily in the smaller tube. This enables the thermometer to detect even small variations in temperature accurately.
What is a narrow tube that is used as a metering device?
capillary tube
The narrow tube that is used as a metering device is a?
capillary tube.
What are the constrictions in a thermometer?
The constriction in a thermometer is a narrow region in the capillary tube where the liquid (like mercury or alcohol) is forced to flow through. This helps to amplify the rise or fall in temperature, making it easier to read.
Describe the structure of a thermometer?
The thermometer consists of a very fine glass tube having a very small bore and is called capillary tube. At one end of capillary tube a very thin glass bulb is provided. The bulb is filled with mercury( most of the times) or alcohol The other end of capillary tube is sealed. The capillary tube is protected by a thick glass tube called stem. On the stem are made markings. These markings are called graduations or degrees.
Does liquid water rinse higher in a narrow tube or a wide tube?
You mean rise not rinse. Higher in a narrow tube due to capillary action.
Where is the capillary tube and bulb in a thermometer?
The capillary tube is the hollow opening inside the thermometer that the liquid rises or lowers in so that you can read the temperature. The bulb is the bottom portion that holds the liquid and the part you use for contact to get a temperature reading. Calvin B.
How does a fluid expansion thermometer work?
A fluid expansion thermometer consists of a bulb filled with a liquid, typically mercury or alcohol, connected to a capillary tube. As the temperature increases, the liquid in the bulb expands and rises up the capillary tube. The temperature is read by measuring the height of the liquid in the tube, which corresponds to the temperature scale on the thermometer.
Why mercury falls in capillary tube?
Mercury falls in a capillary tube due to the combination of capillary action and gravity. Capillary action is the tendency of a liquid to be drawn up into a narrow tube against the force of gravity. When the adhesive forces between the mercury and the walls of the capillary tube are greater than the cohesive forces within the mercury, the mercury will move downward in the tube.
What are the characteristics of the liquid used in a liquid in a glass thermometer?
The liquid in a glass thermometer is typically a non-toxic and non-reactive liquid such as mercury or colored alcohol. These liquids have a high coefficient of thermal expansion, allowing them to accurately measure temperature changes by expanding or contracting within the narrow capillary tube of the thermometer.
