# Thermodynamics (KVPY (Kishore Vaigyanik Protsahan Yojana) Stream SB-SX (Class 12 & 1st Year B.Sc.) Physics): Questions 10 - 13 of 32

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## 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

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.

b.

c.

d.

## 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,

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.

b.

c.

d.

## Question number: 13

» Thermodynamics » Measurement of Temperature

Appeared in Year: 2014

MCQ▾

### Question

Consider two thermometers T1 and T2 of equal length which can be used to measure temperature over the range θ1 to θ2. T1 contains mercury as the thermometric liquid while T2 contains bromine. The volumes of the two liquids are the same at the temperature θ1. The volumetric coefficients of expansion of mercury and bromine are 18 × 10–5 K–1 and 108 × 10–5 K–1, respectively. The increase in length of each liquid is the same for the same increase in temperature. If the diameters of the capillary tubes of the two thermometers are d1 and d2 respectively, then the ratio d1: d2 would be closest to –

### Choices

Choice (4) Response

a.

0.4

b.

2.5

c.

6.0

d.

0.6

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