1
AIPMT 2008
MCQ (Single Correct Answer)
+4
-1
If Q, E and W denote respectively the heat added, change in internal energy and the work done in a closed cyclic process, then
A
E = 0
B
Q = 0
C
W = 0
D
Q = W = 0
2
AIPMT 2007
MCQ (Single Correct Answer)
+4
-1
An engine has an efficiency of 1/6. When the temperature of sink is reduced by 62oC, its efficiency is doubled. Temperatures of the source is
A
37oC
B
62oC
C
99oC
D
124oC.
3
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
The molar specific heat at constant pressure of an ideal gas is (7/2) R. The ratio of specific heat at constant pressure to that at constant volume is
A
9/7
B
7/5
C
8/7
D
5/7
4
AIPMT 2006
MCQ (Single Correct Answer)
+4
-1
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
380 K
B
275 K
C
325 K
D
250 K
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