Describe the construction of a thermocouple thermometer. Specifically, state the materials used, how they are joined, and the type of instrument needed to obtain a reading.
A thermocouple is used to measure the rapidly changing temperature of a small droplet of hot oil. State two reasons why a thermocouple thermometer is highly suitable for this specific measurement.
State and explain the effect on the sensitivity of a liquid-in-glass thermometer of:
increasing the internal diameter (bore) of the capillary tube.
State and explain the effect on the sensitivity of a liquid-in-glass thermometer of:
decreasing the volume of the liquid-filled bulb.
528 exam-style questions on CIE IGCSE Physics 2.2 Thermal properties and temperature, covering 2.2.1 Thermal expansion of solids, liquids and gases, 2.2.2a Internal energy and temperature, 2.2.2b Specific heat capacity, 2.2.3a Melting, boiling, condensation and solidification, 2.2.3b Evaporation, and 2.2.3c Cooling by evaporation. Each one has a worked solution and a mark scheme showing where the marks go.