1
MHT CET 2021 20th September Evening Shift
+1
-0

Two consecutive harmonics of an air column in a pipe closed at one end are of frequencies 150 Hz and 250 Hz. The fundamental frequency of an air column is

A
25 Hz
B
75 Hz
C
100 Hz
D
50 Hz
2
MHT CET 2021 20th September Evening Shift
+1
-0

An air column in a pipe, which is closed at one end will be in resonance with a vibrating tuning fork of frequency 264 Hz for various lengths. Which one of the following lengths is not possible? (V = 330 m/s)

A
62.50 cm
B
93.75 cm
C
156.25 cm
D
31.25 cm
3
MHT CET 2021 20th September Evening Shift
+1
-0

Beats are produced by waves $$\mathrm{y_1=a\sin2000\pi t}$$ and $$\mathrm{y_2=a\sin2008\pi t}$$. The number of beats heard per second is

A
4
B
1
C
zero
D
8
4
MHT CET 2021 20th September Morning Shift
+1
-0

The frequencies of three tuning forks $$\mathrm{A}, \mathrm{B}$$ and $$\mathrm{C}$$ are related as $$\mathrm{n}_{\mathrm{A}}>\mathrm{n}_{\mathrm{B}}>\mathrm{n}_{\mathrm{C}}$$. When the forks $$\mathrm{A}$$ and $$\mathrm{B}$$ are sounded together, the number of beats produced per second is '$$n_1$$'. When forks $$\mathrm{A}$$ and $$\mathrm{C}$$ are sounded together the number of beats produced per second is '$$n_2$$'. How may beats are produced per second when forks $$\mathrm{B}$$ and $$\mathrm{C}$$ are sounded together?

A
$$\mathrm{n}_1-\mathrm{n}_2$$
B
$$\frac{\mathrm{n}_1+\mathrm{n}_2}{2}$$
C
$$\mathrm{n}_2-\mathrm{n}_1$$
D
$$n_1+n_2$$
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Physics
Mechanics
Optics
Electromagnetism
Modern Physics
Chemistry
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Inorganic Chemistry
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