1
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A sound wave is travelling with a frequency of $$50 \mathrm{~Hz}$$. The phase difference between the two points in the path of a wave is $$\frac{\pi}{3}$$. The distance between those two points is (Velocity of sound in air $$=330 \mathrm{~m} / \mathrm{s}$$ )

A
1.1 m
B
0.6 m
C
2.2 m
D
1.7 m
2
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A transverse wave given by $$y=2 \sin (0.01 x+30 t)$$ moves on a stretched string from one end to another end in 0.5 second. If '$$x$$' and '$$y$$' are in $$\mathrm{cm}$$ and '$$\mathrm{t}$$' is in second, then the length of the string is

A
6 m
B
9 m
C
12 m
D
15 m
3
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A pipe open at both ends of length 1.5 m is dipped in water such that the second overtone of vibrating air column is resonating with a tuning fork of frequency 330 Hz. If speed of sound in air is 330 m/s then the length of the pipe immersed in water is (Neglect and correction)

A
0.35 m
B
0.25 m
C
0.55 m
D
0.45 m
4
MHT CET 2021 22th September Morning Shift
MCQ (Single Correct Answer)
+1
-0

A sonometer wire resonates with a given tuning fork forming standing waves with five antinodes between the two bridges when a mass of $$9 \mathrm{~kg}$$ is suspended from the wire. When this mass is replaced by a mass $$\mathrm{M}$$, the wire resonates with the same tuning fork forming three antinodes for the same positions of the bridges. The value of '$$M$$' is

A
$$5 \mathrm{~kg}$$
B
$$12.5 \mathrm{~kg}$$
C
$$\frac{1}{25} \mathrm{~kg}$$
D
$$25 \mathrm{~kg}$$
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