Thermodynamics-Work in Thermodynamic Process and PV Diagrams (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 1 - 2 of 7

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Question number: 1

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2010

MCQ▾

Question

An ideal gas is made to undergo a cycle depicted by the PV diagram alongside. The curved line from A to B is an adiabatic.

A cycle depicted by the PV diagram

A Cycle Depicted by the PV Diagram

In figure a PV diagram of a cycle in which an idea gas is made is shown. The curved line from A to B is an adiabatic.

Then –

Choices

Choice (4) Response
a.

The efficiency of this cycle is given by unity as no heat is released during the cycle

b.

Heat is absorbed in the upper part of the straight line path and released in the lower part

c.

If T1 and T2 are the maximum and minimum temperatures reached during the cycle, then the efficiency is given by 1T2T1

d.

The cycle can only be carried out in the reverse of the direction shown in figure

Question number: 2

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2010

MCQ▾

Question

An ideal gas with constant heat capacity CV=32nR is made to carry out a cycle that is depicted by a triangle in the figure given below.

PV diagram of cycle ABC.

PV Diagram of Cycle ABC.

In figure a PV diagram of an ideal gas process is shown.

The following statement is true about the cycle –

Choices

Choice (4) Response
a.

The efficiency is given 1P1V1P2V2

b.

Heat absorbed in part AC is given by 2(P2V2P1V1)+12(P1V2P2V1)

c.

Net heat absorbed in the cycle is (P2P1)(V2V1)

d.

The efficiency is given by 112P1V1P2V2

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