1
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Two rods A and B of different materials are welded together as shown in figure. Their thermal conductivities are K1 and K2. The thermal conductivity of the composite will be

NEET 2017 Physics - Properties of Matter Question 76 English
A
$${{3\left( {{K_1} + {K_2}} \right)} \over 2}$$
B
$${K_1} + {K_2}$$
C
$$2\left( {{K_1} + {K_2}} \right)$$
D
$${{{K_1} + {K_2}} \over 2}$$
2
NEET 2017
MCQ (Single Correct Answer)
+4
-1
Thermodynamic processes are indicated in the following diagram.

NEET 2017 Physics - Heat and Thermodynamics Question 74 English
Match the following

Column-1 Column-2
P. Process I A. Adiabatic
Q. Process II B. Isobaric
R. Process III C. Isochoric
S. Process IV D. Isothermal
A
P $$ \to $$ C,  Q $$ \to $$ A,  R $$ \to $$ D,   S $$ \to $$ B
B
P $$ \to $$ C,  Q $$ \to $$ D,  R $$ \to $$ B,   S $$ \to $$ A
C
P $$ \to $$ D,  Q $$ \to $$ B,  R $$ \to $$ A,   S $$ \to $$ C
D
P $$ \to $$ A,  Q $$ \to $$ C,  R $$ \to $$ D,   S $$ \to $$ B
3
NEET 2017
MCQ (Single Correct Answer)
+4
-1
A gas mixture consists of 2 moles of O2 and 4 moles of Ar at temperature T. Neglecting all vibrational modes, the total internal energy of the system is
A
15 RT
B
9 RT
C
11 RT
D
4 RT
4
NEET 2017
MCQ (Single Correct Answer)
+4
-1
A carnot engine having an efficiency of $${1 \over {10}}$$ 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
99 J
C
100 J
D
1 J
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