1
MHT CET 2021 23rd September Evening Shift
MCQ (Single Correct Answer)
+1
-0

The frequency of a tuning fork is $$220 \mathrm{~Hz}$$ and the velocity of sound in air is $$330 \mathrm{~m} / \mathrm{s}$$. When the tuning fork completes 80 vibrations, the distance travelled by the

A
120 m
B
60 m
C
53 m
D
100 m
2
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two waves $$\mathrm{Y}_1=0.25 \sin 316 \mathrm{t}$$ and $$\mathrm{Y}_2=0.25 \sin 310 \mathrm{t}$$ are propagation same direction. The number of beats produced per second are

A
$$\frac{3}{\pi}$$
B
$$\frac{\pi}{3}$$
C
$$\frac{\pi}{2}$$
D
$$\frac{2}{\pi}$$
3
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two waves are represented by the equation, $$\mathrm{y}_1=\mathrm{A} \sin (\omega \mathrm{t}+\mathrm{kx}+0.57) \mathrm{m}$$ and $$\mathrm{y}_2=\mathrm{A} \cos (\omega \mathrm{t}+\mathrm{kx}) \mathrm{m}$$, where $$\mathrm{x}$$ is in metre and $$\mathrm{t}$$ is in second. What is the phase difference between them?

A
0.57 radian
B
1.0 radian
C
1.57 radian
D
1.25 radian
4
MHT CET 2021 23th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

The fundamental frequency of an air column in pipe 'A' closed at one end coincides with second overtone of pipe 'B' open at both ends. The ratio of length of pipe 'A' to that of pipe 'B' is

A
3 : 8
B
3 : 4
C
1 : 6
D
2 : 3
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