Q. Heat lost by hot body = heat gained by cold body is based on __________.

गर्म वस्तु द्वारा नष्ट की गई ऊष्मा = ठंडी वस्तु द्वारा प्राप्त ऊष्मा __________ पर आधारित होती है।

A
Newton's law
न्यूटन का नियम
B
Law of conservation of energy
ऊर्जा संरक्षण का नियम
C
Boyle’s law
बॉयल के नियम
D
Ohm’s law
ओम कानून

Explanation

This principle comes from the Law of Conservation of Energy, which states that energy can neither be created nor destroyed—only transferred.
In calorimetry, this means:

Heat lost by hot body=Heat gained by cold body\text{Heat lost by hot body} = \text{Heat gained by cold body}

assuming no heat is lost to the surroundings.

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