Thermodynamics-Work in Thermodynamic Process and PV Diagrams (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 3 - 6 of 8

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Question number: 3

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2011

MCQ▾

Question

One mole of an ideal gas at initial temperature T, undergoes a quasi-static process during which the volume V is doubled. During the process the internal energy U obeys the equation Equation , where a is a constant. The work done during this process is

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 4

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2011

MCQ▾

Question

A constant amount of an ideal gas undergoes the cyclic process ABCA in the PV diagram shown below

Shows PV diagram of cycle

Shows PV Diagram of Cycle

In figure PV diagram of a cycle ABC is shown.

The path BC is an isothermal. The work done by the gas during one complete cycle, beginning and ending at A, is nearly –

Choices

Choice (4) Response

a.

-600 kJ

b.

-300 kJ

c.

600 kJ

d.

300 kJ

Question number: 5

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2012

MCQ▾

Question

An ideal monatomic gas expands to twice its volume. If the process is isothermal, the magnitude of work done by the gas is Wi. If the process is adiabatic the magnitude of work done by the gas is Wa. Which of the following is true,

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 6

» Thermodynamics » Work in Thermodynamic Process and PV Diagrams

Appeared in Year: 2013

MCQ▾

Question

The three processes in a thermodynamic cycle shown in the figure are: Process 1⟶ 2 is isothermal; Process 2⟶ 3 is isochoric (volume remains constant); Process 3 ⟶ 1 is adiabatic. The total work done by the ideal gas in this cycle is 10 J. The internal energy decreases by 20 J in the isochoric process. The work done by the gas in the adiabatic process is –20 J. The heat added to the system in the isothermal process is

PV diagram of a cycle of three processes

PV Diagram of a Cycle of Three Processes

In figure PV diagram of a cycle of three processes is shown. Process 1 to 2 is isothermal, process 2 to 3 is isochoric and process 3 to 1 is adiabatic.

Choices

Choice (4) Response

a.

0 J

b.

20 J

c.

10 J

d.

30 J

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