Smartindia Classroom
CONTENTS
Physics
Botany
Zoology
Mathematics
Chemistry
Back to home
Start Practice
Question-1
If the temperature of the sun is doubled, the rate of energy received on earth will be increased by a factor of
(A)
2
(B)
4
(C)
8
(D)
16
Question-2
The efficiency of Carnot engine is 50% and temperature of sink is 500 K. If the temperature of source is kept constant and its efficiency is to be raised to 60%, then the required temperature of the sink will be
(A)
600 K
(B)
500 K
(C)
400 K
(D)
100 K
Question-3
First law of thermodynamics is a consequence of conservation of
(A)
Work
(B)
Energy
(C)
Heat
(D)
All of these
Question-4
The efficiency of a Carnot engine operating between temperatures of 100
o
C and -23
o
C will be
(A)
(B)
(C)
(D)
Question-5
In thermal equilibrium, the average velocity of a gas molecule is
(A)
Proportional to T
3
(B)
Proportional to T
2
(C)
Proportional to
(D)
Zero
Question-6
An ideal gas undergoing adiabatic change has the following pressure-temperature relationship
(A)
p
γ-1
T
γ
= constant
(B)
p
γ
T
γ-1
= constant
(C)
p
γ
T
1-γ
= constant
(D)
p
1-γ
T
γ
= constant
Question-7
We consider a thermodynamic system. If ΔU represents the increase in its internal energy and W the work done by the system, which of the following statements is true?
(A)
ΔU = - W in an adiabatic process
(B)
ΔU = W in an isothermal process
(C)
ΔU = - W in an isothermal process
(D)
ΔU = W in an adiabatic process
Question-8
Initial pressure and volume of a gas are P and V respectively. First the gas is expanded isothermally to 4V and then its volume is made V by adiabatic process. Its final pressure (γ = 1.5) is
(A)
8 P
(B)
4 P
(C)
P
(D)
2 P
Question-9
A scientist says that the efficiency of his heat engine which works at source temperature of 127
o
C and sink temperature 27
o
C is 26%.
(A)
It is impossible
(B)
It is possible but less probable
(C)
It is quite possible
(D)
Data is incomplete
Question-10
The temperature of an ideal gas is increased from 120 K to 480 K. If at 120 K, the root mean square velocity of gas molecules is v, at 480 K it becomes
(A)
4 v
(B)
2 v
(C)
v/2
(D)
v/4
Your Score 0/10
Click
here
to see your answersheet and detailed track records.
Plus 1 Biology Science
Tamil Nadu (English Medium)
Practice in Related Chapters
Nature of the Physical World and Measurement
Kinematics
Mechanics of Solids and Fluids
Wave Motion
Heat and Thermodynamics
Ray Optics
Gravitation and Space Science
Oscillations
Dynamics of Rotational Motion
Magnetism
Powered By