Which of the following statements regarding temperature of an object in Kelvin scale is/are correct ?
- 1. It can be a negative, zero or positive quantity.
- 2. It can either be a negative or a positive quantity.
- 3. It can never be negative.
- 4. It can be a positive definite quantity.
Select the correct answer using the code given below :
1 and 2 only
2 and 4 only
3 and 4 only
4 only
Answer is Right!
Answer is Wrong!
This question was previously asked in
UPSC CISF-AC-EXE – 2018
Statement 1: Incorrect, as Kelvin temperature cannot be negative.
Statement 2: Incorrect, as Kelvin temperature cannot be negative and can be zero.
Statement 3: Correct, Kelvin temperature can never be negative (it is always $\ge 0$).
Statement 4: Interpreting “positive definite quantity” in this context to mean a quantity that is positive or zero (non-negative), this statement is correct, as Kelvin temperature is always $\ge 0$. If interpreted strictly as strictly positive (> 0), it would be incorrect as 0 K is possible. Given the options, the non-negative interpretation is most likely intended for statement 4, making both 3 and 4 correct.