Question

Gas thermometers are more sensitive as compared to liquid thermometers, as their

• A. Coefficient of expansion is very high.
• B. Coefficient of expansion is very low.
• C. Density is very high.
• D. None of these.

Answer 1

The correct option is A

Coefficient of expansion is very high.

Gas thermometers:

1. A gas thermometer is a thermometer that measures temperature by the variation in volume or pressure of a gas.

Liquid thermometers:

1. The liquid in glass thermometer is a contact type thermometer which measures temperature from changes in the volume of a liquid.

Explanation for correct answer.

1. Gas will expand more than liquids for the same small change in temperature.
2. Gas thermometers are more sensitive as compared to liquid thermometers, due to their large cubical expansion.
3. Therefore, Gas thermometers are more sensitive as compared to liquid thermometers, as their coefficient of expansion is very high.

Hence, option (A) is the correct answer.