The first law of thermodynamics is a statement of:
AConservation of momentum
BConservation of charge
CConservation of energy
DConservation of mass
Answer & Solution
Correct answer: C. Conservation of energy
1. First law: ΔU = Q − W, where Q is heat added to system and W is work done BY system.
2. It says the change in internal energy of a system equals the net energy transferred to it.
3. So it is simply the principle of energy conservation extended to include heat.
_Source: NCERT Class 11 Physics Ch 11 "Thermodynamics", §11.5 First Law_
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