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

A Carnot engine uses diatomic gas as a working substance. During the adiabatic expansion part of the cycle, if the volume of the gas becomes 32 times its initial volume, then the efficiency of the engine is

A

$100 \%$

B

$75 \%$

C

$50 \%$

D

$25 \%$

2
TG EAPCET 2025 (Online) 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

The ratio of the average translational kinetic energies of hydrogen and oxygen at the same temperature is

A

$1: 8$

B

$1: 4$

C

$1: 1$

D

$1: 6$

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

The air columns in two tubes closed at one end vibrating in their fundamental modes produce 2 beats per second. The number of beats produced per second when the same tubes are vibrated in their fundamental mode with their both ends open are

A

1

B

2

C

3

D

4

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

A car moving towards a cliff emits sound of frequency ' $n$ '. If the difference in frequencies of the horn and its echo heard by the driver of the car is $10 \%$ of ' $n$ ', then the speed of the car is nearly

(Speed of sound in air is $336 \mathrm{~ms}^{-1}$ )

A

$16 \mathrm{~ms}^{-1}$

B

$18 \mathrm{~ms}^{-1}$

C

$30 \mathrm{~ms}^{-1}$

D

$33 \mathrm{~ms}^{-1}$

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