1
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
$135 \times 10^6 \mathrm{~J}$
2
AP EAPCET 2024 - 20th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The temperature difference across two cylindrical rods $A$ and $B$ of same material and same mass are $40^{\circ} \mathrm{C}$ and $60^{\circ} \mathrm{C}$ respectively. In steady state, if the rates of flow of heat through the rods $A$ and $B$ are in the ratio 3:8, the ratio of the length of the rods $A$ and $B$ is
A
$1: 3$
B
$5: 3$
C
$4: 3$
D
$2: 3$
3
AP EAPCET 2024 - 20th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
The efficiency of Carnot cycle is $\frac{1}{6}$. By lowering the temperature of sink by 65 K , it increases to $\frac{1}{3}$. The initial and final temperature of the sink are
A
$400 \mathrm{~K}, 310 \mathrm{~K}$
B
$525 \mathrm{~K}, 65 \mathrm{~K}$
C
$309 \mathrm{~K}, 235 \mathrm{~K}$
D
$325 \mathrm{~K}, 260 \mathrm{~K}$
4
AP EAPCET 2024 - 20th May Morning Shift
MCQ (Single Correct Answer)
+1
-0
In a cold storage ice melts at the rate of 2 kg per hour when the external temperature is $20^{\circ} \mathrm{C}$. The minimum power output of the motor used to drive the refrigerator which just prevents the ice from melting is (latent heat of fusion of ice $=80 \mathrm{calg}^{-1}$ )
A
28.5 W
B
13.6 W
C
9.75 W
D
16.4 W
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