Question

Which one of these thermometers is/are not portable as well as simple to use
(This question has multiple correct answers)
A. Constant-volume gas thermometer
B. Resistance thermometer
C. Thermocouple
D. Mercury-in-glass thermometer

Answer 1

A thermometer is a device which is used to measure temperature. Every thermometer has a sensor. So, out of the given options, find out which thermometer(s) is/are hard to use and have complex structure.

Complete step by step answer:
We are given four options and we have to find which thermometers are not portable and complex.Thermometers are the examples of the zeroth law of thermodynamics.
First one is a Constant-volume gas thermometer. Constant volume gas thermometer consists of a bulb filled with a fixed amount of a dilute gas which is attached to a mercury manometer. The manometer is used to measure variation in pressure. This thermometer works based on the principle of Law of Gay-Lussac. So when the temperature of the gas increases, then the pressure increases. This thermometer is used to calibrate other thermometers.Second one is Resistance thermometer. This thermometer is used to measure temperature change by its effect on the electrical resistance of a platinum wire. These use sensors. Third one is a Thermocouple, also called a thermoelectric thermometer, is a temperature-measuring device consisting of two wires of different metals joined at each end. These senses temperature by using two conductors of dissimilar metals joined together at one end.Fourth one is Mercury-in-glass thermometer. It consists of a bulb containing mercury attached to a glass tube of narrow diameter. The volume of mercury changes slightly with temperature; the small change in volume drives the narrow mercury column a relatively long way up the tube.Here, Constant-volume gas thermometer, Resistance thermometer, Thermocouple are very big bulky and complex to use.
The only portable thermometer is Mercury-in-glass thermometer.
Options A, B, C are the answers.

Note: Temperature is a measure to express hotness and coldness of a body or a place. The units of temperature are Celsius, Kelvin, Rankine and Fahrenheit.