The Kelvin scale is an absolute temperature scale, with 0 K being absolute zero. The Celsius scale is a relative scale where 0°C is the freezing point of water and 100°C is the boiling point of water (at standard atmospheric pressure). A change of 1 degree Celsius is equal to a change of 1 Kelvin.
If $x$ is the temperature of a system in Kelvin and $y$ is the temperature of the system in ${}^\circ\text{C}$, then the correct relation between them is
Asked in UPSC CDS 1 2020 · Topic: Heat and Thermodynamics (Zeroth and First Laws of Thermodynamics (Internal Energy, Work, Heat, Enthalpy))
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