Test: Temperature & its Measurement - JAMB MCQ

Density is not a thermometric property as it does not directly relate to the measurement of temperature. Expansion, conductivity, and resistance are properties that change with temperature and are used in various thermometers for temperature measurement.

Calibration is the process of checking and adjusting a thermometer's readings by comparing it with a known reference or standard. It ensures the accuracy and reliability of temperature measurements.

The Kelvin scale is an absolute temperature scale where zero Kelvin (0 K) represents absolute zero, the lowest possible temperature. It does not have negative values. Celsius, Fahrenheit, and Rankine scales can have negative values.

Mercury-in-glass thermometers use the expansion of mercury inside a glass capillary to measure temperature. The rise or fall of the mercury column indicates the temperature.

The boiling point of water at standard atmospheric pressure is 100°C on the Celsius scale. This is the temperature at which water changes from a liquid to a gaseous state.

Infrared thermometers are most suitable for measuring high temperatures without making physical contact. They detect and measure the infrared radiation emitted by an object to determine its temperature.

To convert from Celsius to Kelvin, we add 273. Therefore, 50°C + 273 = 323 K. Kelvin is an absolute temperature scale where the zero point is equivalent to -273.15°C.

The Fahrenheit scale has the same magnitude as Celsius but a different zero point. In Fahrenheit, the freezing point of water is at 32°F and the boiling point is at 212°F.

A resistance thermometer uses the change in electrical resistance of a metal with temperature to measure temperature accurately. The resistance varies with temperature, and this variation is measured and correlated to the temperature.

The Kelvin scale is considered a secondary standard temperature scale. It is based on the absolute temperature scale and is widely used in scientific and engineering applications for precise temperature measurements.