Question

Which one of these thermometers is/are not portable as well as simple to use?

• A. Constant-volume gas thermometer
• B. Resistance thermometer
• C. Thermocouple
• D. Mercury-in-glass thermometer

Answer 1

Answer: (A), (B), (C)

Constant-volume gas thermometer
Resistance thermometer
Thermocouple

Constant-volume gas thermometer,Resistance thermometer,Thermocouple are bulky,big and are not easy to use.

The only portable thermometer is Mercury in glass themometer.

The mercury-in-glass or mercury thermometer was invented by physicist Daniel Gabriel Fahrenheit in Amsterdam (1714). It consists of a bulb containing mercury attached to a glass tube of narrow diameter; the volume of mercury in the tube is much less than the volume in the bulb. 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. The space above the mercury may be filled with nitrogen gas or it may be at less than atmospheric pressure, a partial vacuum.