1
AP EAPCET 2024 - 21th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
A metal block is made from mixture of 2.4 kg of aluminium, 1.6 kg of brass and 0.8 kg of copper. The metal block is initially at $20^{\circ} \mathrm{C}$. If the heat supplied to the metal block is 44.4 cal . Find the final temperature of the block if specific heats of aluminium, brass and copper are $0.216,0.0917$ and $0.0931 \mathrm{cal} \mathrm{kg}^{-10} \mathrm{C}^{-1}$ respectively
A
$100^{\circ} \mathrm{C}$
B
$60^{\circ} \mathrm{C}$
C
$40^{\circ} \mathrm{C}$
D
$80^{\circ} \mathrm{C}$
2
AP EAPCET 2024 - 21th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
An ideal gas is found to obey $p V^{\frac{3}{2}}=$ constant during an adiabatic process. If such a gas initially at temperature $T$ is adiabatically compressed to $\frac{1}{4}$ th of its volume, then its final temperature is
A
$\sqrt{3 T}$
B
$\sqrt{2} T$
C
$2 T$
D
$3 T$
3
AP EAPCET 2024 - 21th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The condition $d W=d Q$ holds good in the following process.
A
Adiabatic process
B
Isothermal process
C
Isochoric process
D
Isobaric process
4
AP EAPCET 2024 - 21th May Evening Shift
MCQ (Single Correct Answer)
+1
-0
The efficiency of a Carnot engine found to increase from $25 \%$ to $40 \%$ on increasing the temperature ( $T_1$ ) of source alone through 100 K . The temperature $\left(T_2\right)$ of the sink is given by
A
300 K
B
250 K
C
325 K
D
125 K
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