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Question-1
Calorimeters are made of which of the following ?
(A)
Glass
(B)
Metal
(C)
Wood
(D)
Either (1) or (2)
Question-2
Wien's law states that :
(A)
T + λ
m
= constant
(B)
λ
m
T= constant
(C)
λ
m
/T = constant
(D)
T
4
/ λ
m
= constant
Question-3
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-4
A thermodynamic process is shown in the figure. The pressure and volumes corresponding to some points in the figure are
P
A
= 3 × 10
4
Pa, VA = 2 × 10
-3
m
3
PB = 8 × 10
4
Pa, VB = 5 × 10
-3
m
3
In process AB, 600 J of heat is added to the system and in process BC, 200 J of heat is added to the system. The change in internal energy of the system in process AC would be
(A)
800 J
(B)
560 J
(C)
600 J
(D)
640 J
Question-5
In an adiabatic process, the quantity which remains constant is
(A)
Volume
(B)
Pressure
(C)
Temperature
(D)
Total heat of the system
Question-6
The volume of a liquid is 830 m
3
at 30
o
C and it is 850 m
3
at 90
o
C. The coefficient of volume expansion of the liquid is
(A)
(B)
(C)
(D)
Question-7
The temperature of source and sink of a heat engine are 127
o
C and 27
o
C respectively. An inventor claims its efficiency to be 26%, then
(A)
It is impossible
(B)
It is possible with high probability
(C)
It is possible with low probability
(D)
Data are insufficient
Question-8
The internal energy change in a system that has absorbed 2 k cal of heat and done 500 J of work is
(A)
8900 J
(B)
6400 J
(C)
5400 J
(D)
7900 J
Question-9
A Carnot engine whose sink is at 300 K has an efficiency of 40%. By how much should the temperature of source be increased so as to increase its efficiency by 50% of original efficiency?
(A)
275 K
(B)
325 K
(C)
250 K
(D)
380 K
Question-10
The number of degrees of freedom for molecules of a mono atomic gas is
(A)
3
(B)
4
(C)
5
(D)
6
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Plus 1 Computer Science
Tamil Nadu (English Medium)
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