Thermodynamics (KVPY Stream SB-SX (Class 12 & 1st Year BSC) Physics): Questions 9 - 12 of 30

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Question number: 9

» Thermodynamics » Concept of Temperature

Appeared in Year: 2012

MCQ▾

Question

Two identical bodies are made of a material for which the heat capacity increases with temperature. One of these is held at a temperature of 1000C while the other one is kept at 00 C. If the two are brought into contact, then, assuming no heat loss to the environment, the final temperature that they will reach is,

Choices

Choice (4) Response

a.

less than 500C

b.

00C

c.

more than 500C

d.

500C

Question number: 10

» 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: 11

» 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.

Wa>Wi=0

b.

Wi>Wa>0

c.

Wi=Wa>0

d.

Wi>Wa=0

Question number: 12

» Thermodynamics » Thermal Equilibrium

Appeared in Year: 2013

MCQ▾

Question

The equation of state of n moles of a non-ideal gas can be approximated by the equation,

(P+n2aV2)(Vnb)=nRT

Where a and b are constants characteristic of the gas. Which of the following can represent the equation of quasi-static adiabatic for this gas (Assume that CV, the molar heat capacity at constant volume, is independent of temperature)?

Choices

Choice (4) Response

a.

T(Vnb)CVR=constant

b.

(T+abV2R)(Vnb)RCV=constant

c.

(T+n2abV2R)(Vnb)CVR=constant

d.

T(Vnb)RCV=constant

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