Question

Thermo electric thermometers are advantageous than ordinary thermometer because:

• A. They are less sensitive.
• B. The junctions are very sharp hence small portions of the bodies can also be measured.
• C. Thermal capacity of the junctions is small hence rapidly changing temperatures can be measured.
• D. b & c both are correct.

Answer 1

Answer: (D)

b & c both are correct.

Thermoelectric thermometers are advantageous over ordinary thermometers due to the following reasons:

1. The junctions are sharp and is made into a micro size to measure body temperature of insects.
2. The thermal capacity of the hot junction is very small and rapidly changing temperature to an accuracy of 0.025 degrees celsius is measured.
3. Wide range of temperatures are measured say -200 degrees celsius to 1600 degrees celsius.
4. The temperature of animal bodies at a distance also can be measured.
   

hence we can see option B and option C both are correct.