The law about equilibrium with a third system is the:
AFourth law
BZeroth law
CFirst law
DThird law
Answer & Solution
Correct answer: B. Zeroth law
1. The law came to be numbered after the others were named.
2. It underpins the very idea of temperature.
3. It is the zeroth law of thermodynamics.
_Source: NCERT Class 11 Physics Part II, Chapter 12, Thermodynamics._
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