Question

Assertion (A): Rapidly changing temperatures can be measured by thermocouples.
Reason (R): The thermal capacity of the junction of a thermocouple is very small.

• A. Both A and R are true and R is correct explanation of A
• B. Both A and R are true and R is not correct explanation of A
• C. A is true R is false
• D. A is false R is true.

Answer 1

The correct option is A Both A and R are true and R is correct explanation of A

Thermal capacity of thermo-couple is less and its thermal conductivity is more so that it is used to measure range of temperature -200 degree Celsius to 1600 degree Celsius.
so it is used to measure rapid changes in temperature.