Physics · 2023
JEE Main · 29 January 2023, Shift 1 · Q14
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R. Assertion A: If d Q and d W represent the heat…
Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.Assertion A: If $\displaystyle d Q$ and $\displaystyle d W$ represent the heat supplied to the system and the work done on the system respectively. Then according to the first law of thermodynamics $\displaystyle d Q=d U-d W$.
Reason R: First law of thermodynamics is based on law of conservation of energy.In the light of the above statements, choose the correct answer from the options given below:
Official answer
From NTA’s final answer key for this paper.
(4)
Both A and R are correct and R is the correct explanation of A
More from Thermodynamics
- The volume of an ideal gas (γ=1.5) is changed adiabatically from 5 litres to 4 litres. The ratio of initial pressure to final pressure is:2024
- The magnitude of heat exchanged by a system for the given cyclic process ABCA (as shown in figure) is (in SI unit):2025
- The pressure of a gas changes linearly with volume from A to B as shown in figure. If no heat is supplied to or extracted from the gas then change in…2023
- An engine operating between the boiling and freezing points of water will have A. efficiency more than 27 %. B. efficiency less than the efficiency…2023
- Match the LIST-I with LIST-II Choose the correct answer from the options given below:2025
- During an adiabatic process, the pressure of a gas is found to be proportional to the cube of its absolute temperature. The ratio of Cp/Cv for the…2024
- An ideal gas exists in a state with pressure P_0, volume V_0. It is isothermally expanded to 4 times of its initial volume (V_0), then isobarically…2025
- A diatomic gas (γ=1.4) does 100 J of work when it is expanded isobarically. Then the heat given to the gas ____ J.2026
JEE Main 2023 Physics question, with the answer from NTA’s final answer key. Where our answers come from.