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Thermometer

0 K is fixed ...

Question

$0 K$ is fixed as the lower point in Kelvin scale of a thermometer.

A

True

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B

False

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Solution

The correct option is B False
The lower fixed value for temperature scales is the melting point of pure water at atmospheric pressure. Melting point of water is equal to $0^{\circ} C$ which is also equal to $273.15 K$ .

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Similar questions

When water is heated at $100^{\circ} C$ , we see no rise in temperature in the thermometer.

The Kelvin scale temperature is 0 K. What is the corresponding Celsius scale temperature ?

Q. The boiling point of water is

100^{0} K

. Identify the mistake(s) in the statement and correct it in Kelvin scale.

Q. Answer the following : (a) The triple-point of water is a standard fixed point in modern thermometry. Why ? What is wrong in taking the melting point of ice and the boiling point of water as standard fixed points (as was originally done in the Celsius scale) ? (b) There were two fixed points in the original Celsius scale as mentioned above which were assigned the number 0 °C and 100 °C respectively. On the absolute scale, one of the fixed points is the triple-point of water, which on the Kelvin absolute scale is assigned the number 273.16 K. What is the other fixed point on this (Kelvin) scale ? (c) The absolute temperature (Kelvin scale) T is related to the temperature tc on the Celsius scale by t_c = T – 273.15 Why do we have 273.15 in this relation, and not 273.16 ? (d) What is the temperature of the triple-point of water on an absolute scale whose unit interval size is equal to that of the Fahrenheit scale ?

Q. Assertion :The lowest attainable temperature is absolute zero,i.e.,

0 K = - {273.15}^{o} C .

Reason: Size of each degree on Kelvin scale is same as that on Celsius scale.

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