1
MHT CET 2021 24th September Evening Shift
+1
-0

A closed organ pipe and an open organ pipe of same length produce 2 beats per second when they are set into vibrations together in fundamental mode. The length of open pipe is now halved and that of closed pipe is doubled. The number of beats produced per second will be

A
4
B
3
C
8
D
7
2
MHT CET 2021 24th September Morning Shift
+1
-0

A sonometer wire of length 25 cm vibrates in unison with a tuning fork. When its length is decreased by 1 cm, 6 beats are heard per second. What is the frequency of the tuning fork?

A
200 Hz
B
72 Hz
C
100 Hz
D
144 Hz
3
MHT CET 2021 24th September Morning Shift
+1
-0

Two tuning forks of frequencies $$320 \mathrm{~Hz}$$ and $$480 \mathrm{~Hz}$$ are sounded together to produce sound waves. The velocity of sound in air is $$320 \mathrm{~ms}^{-1}$$. The difference between wavelengths of these waves is nearly

A
48 cm
B
16.5 cm
C
33 cm
D
42 cm
4
MHT CET 2021 24th September Morning Shift
+1
-0

When an air column in a pipe open at both ends vibrates such that four antinodes and three nodes are formed, then the corresponding mode of vibration is

A
first overtone
B
second overtone
C
fourth overtone
D
third overtone
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