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

At constant pressure, equal amounts of heat are supplied to a monoatomic gas and a diatomic gas separately. The ratio of the increases in internal energies of the two gases is

A

$1: 1$

B

$9: 49$

C

$3: 7$

D

$21: 25$

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

If the rms speed of the molecules of a gas at a temperature of $77^{\circ} \mathrm{C}$ is $50 \mathrm{~ms}^{-1}$, then the rms speed of the same gas molecules at a temperature of $150.5^{\circ} \mathrm{C}$ is

A

$65 \mathrm{~ms}^{-1}$

B

$35 \mathrm{~ms}^{-1}$

C

$55 \mathrm{~ms}^{-1}$

D

$45 \mathrm{~ms}^{-1}$

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

Two tuning forks of frequencies 320 Hz and 323 Hz are vibrated together. The time interval between a maximum sound and its adjacent minimum sound heard by an observer is

A

$\frac{1}{6} \mathrm{~s}$

B

$\frac{1}{3} \mathrm{~s}$

C

$\frac{1}{12} \mathrm{~s}$

D

$\frac{1}{9} \mathrm{~s}$

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

The frequency of sound heard by an observer moving towards a stationary source with certain speed is $n_1$ and if the observer moves away from the same source with same speed, the frequency of sound heard by the observer is $n_2$. If the speed of sound in air is $340 \mathrm{~ms}^{-1}$ and $n_1: n_2=71: 65$, then speed of observer is

A

$36 \mathrm{~km} / \mathrm{h}$

B

$27 \mathrm{~km} / \mathrm{h}$

C

$15 \mathrm{~km} / \mathrm{h}$

D

$54 \mathrm{~km} / \mathrm{h}$

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