1
AIPMT 2015 Cancelled Paper
+4
-1
A Carnot engine, having an efficiency of as heat engine, is used as a refrigerator. If the work done on the system is 10 J, the amount of energy absorbed from the reservoir at lower temperature is
A
90 J
B
1 J
C
100 J
D
99 J
2
AIPMT 2015 Cancelled Paper
+4
-1
The ratio of the specific heats $${{{C_p}} \over {{C_v}}} = \gamma$$ in terms of degrees of freedom (n) is given by
A
$$\left( {1 + {2 \over n}} \right)$$
B
$$\left( {1 + {n \over 2}} \right)$$
C
$$\left( {1 + {1 \over n}} \right)$$
D
$$\left( {1 + {n \over 3}} \right)$$
3
AIPMT 2015 Cancelled Paper
+4
-1
Figure below shows two paths that may be taken by a gas to go from a state A to a state C.

In process AB, 400 J of heat is added to the system and in process BC, 100 J of heat is added to the system. The heat absorbed by the system in the process AC will be
A
460 J
B
300 J
C
380 J
D
500 J
4
AIPMT 2015 Cancelled Paper
+4
-1
One mole of an ideal diatomic gas undergoes a transition from A to B along a path AB as shown in the figure.

The change in internal energy of the gas during the transition is
A
20 J
B
$$-$$ 12 kJ
C
20 kJ
D
$$-$$ 20 kJ
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