1
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The efficiency of a Carnot's engine is $25 \%$. When the temperature of sink is 300 K . The increase in the temperature of source required for the efficiency to become $50 \%$ is
A
225 K
B
400 K
C
200 K
D
100 K
2
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
When 100 J of heat is supplied to a gas, the increase in the internal energy of the gas is 60 J . Then the gas is /can
A
be triatomic or diatomic gas
B
triatomic gas
C
monoatomic gas
D
diatomic gas
3
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
An ideal gas is kept in a cylinder of volume $3 \mathrm{~m}^3$ at a pressure of $3 \times 10^5 \mathrm{~Pa}$. The energy of the gas is
A
$13.5 \times 10^6 \mathrm{~J}$
B
$1.35 \times 10^5 \mathrm{~J}$
C
$13.5 \times 10^5 \mathrm{~J}$
D
$135 \times 10^6 \mathrm{~J}$
4
AP EAPCET 2024 - 20th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
A pipe with 30 cm length is open at both ends. Which harmonic mode of the pipe resonates with the 1.65 kHz source? (Velocity of sound in air $=330 \mathrm{~ms}^{-1}$ )
A
2
B
3
C
3.5
D
2.5
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