Q174
General SciencePhysics
Dilatometer is used for the measurement of
- a.electrical energy
- b.mechanical energy
- c.dimensional change in material
- d.thermal energy
Answer: (C) dimensional change in material
A dilatometer measures dimensional change - the expansion or contraction in volume or length of a solid or liquid - caused by heating, cooling or a chemical or phase change; it is used to find coefficients of thermal expansion. Electrical energy is measured by an energy (watt-hour) meter, heat by a calorimeter, and mechanical force or power by a dynamometer. Similar-sounding instruments: lactometer (purity of milk), hydrometer (relative density of liquids), hygrometer (humidity), pyrometer (high temperatures), manometer (gas pressure).