1
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Three moles of an ideal gas undergoes a cyclic process $A B C A$ as shown in the figure. The pressure, volume and absolute temperature at points $A, B$ and $C$ are respectively $\left(p_1, V_1, T_1\right),\left(p_2, 3 V_1, T_1\right)$ and $\left(p_2, V_1, T_2\right)$. Then, the total work done in the cycle $A B C A$ is ( $R=$ Universal gas constant).

TG EAPCET 2025 (Online) 3rd May Morning Shift Physics - Heat and Thermodynamics Question 85 English

A

$R T_1[3 \ln (3)+2]$

B

$R T_1[3 \ln (2)]$

C

$3 R T_1[\ln (3)]$

D

$R T_1[3 \ln (3)-2]$

2
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The pressure of a mixture of 64 g of oxygen, 28 g of nitrogen and 132 g of carbon dioxide gases in a closed vessel is $p$. Under isothermal conditions if entire oxygen is removed from the vessel, the pressure of the mixture of remaining two gases is

A

$p$

B

$\frac{3 p}{2}$

C

$\frac{p}{3}$

D

$\frac{2 p}{3}$

3
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A sound wave of frequency 210 Hz travels with a speed of $330 \mathrm{~ms}^{-1}$ along the positive $X$-axis. Each particle of the wave moves a distance of 10 cm between the two extreme points. The equation of the displacement function ( s ) of this wave is ( $x$ in metre, $t$ in second)

A

$s(x, t)=0.10 \sin [4 x-1320 t] \mathrm{m}$

B

$\mathrm{s}(x, t)=0.05 \sin [4 x-1320 t] \mathrm{m}$

C

$s(x, t)=0.05 \sin [1320 x-4 t] \mathrm{m}$

D

$s(x, t)=0.10 \sin [1320 x-4 t] m$

4
TG EAPCET 2025 (Online) 3rd May Morning Shift
MCQ (Single Correct Answer)
+1
-0

A string vibrates in its fundamental mode when a tension $T_1$ is applied to it. If the length of the string is decreased by $25 \%$ and the tension applied is changed to $T_2$, the fundamental frequency of the string increases by $100 \%$, then $\frac{T_2}{T_1}=$

(Linear density of the string is constant)

A

$\frac{3}{8}$

B

$\frac{2}{3}$

C

$\frac{8}{9}$

D

$\frac{9}{4}$

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