Physics Test 11

Result

Physics Test 11

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Weekly Quiz Competition

Question 1
4 / -1

The First Law of thermodynamics confirms the law of

A
Conservation of momentum of molecules

B
Conservation of energy

C
Flow of heat in a particular direction

D
Conservation of heat energy and mechanical energy

Solution

First law of thermodynamics tells that heat and work are interconvertible according to the relation w = JQ, on the basis of law of conservation of energy.
Hence, option B is correct.
Question 2
4 / -1

A thermodynamical systems is changed from state (P₁, V₁) to (P₂, V₂) by two different process, the quantity which will remain same will be

A
ΔQ

B
ΔW

C
ΔQ + ΔW

D
ΔQ – ΔW

Solution

For all processes, change in internal energy ΔU = (ΔQ – ΔW) Wdoes not change. It depends only on initial and final states.
Hence, option D is correct.