1
MHT CET 2024 10th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

Stationary wave is produced along the stretched string of length 80 cm . The resonant frequencies of string are $90 \mathrm{~Hz}, 150 \mathrm{~Hz}$ and 210 Hz . The speed of transverse wave in the string is

A
45 m/s
B
75 m/s
C
48 m/s
D
80 m/s
2
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The pipe open at both ends and pipe closed at one end have same length and both are vibrating in fundamental mode. Air column vibrating in open pipe has resonance frequency $n_1$ and air column vibrating in closed pipe has resonance frequency $\mathrm{n}_2$, then

A
$\mathrm{n}_1=2 \mathrm{n}_2$
B
$\mathrm{n}_1=\mathrm{n}_2$
C
$2 \mathrm{n}_1=\mathrm{n}_2$
D
$3 \mathrm{n}_1=4 \mathrm{n}_2$
3
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

Two sound waves having displacements $x_1=2 \sin (1000 \pi t)$ and $x_2=3 \sin (1006 \pi t)$, when interfere, produce

A
5 beats/s with maximum intensity 25 units
B
6 beats/s with maximum intensity 16 units
C
3 beats/s with maximum intensity 25 units
D
1 beats/s with maximum intensity 5 units
4
MHT CET 2024 10th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

When the listener moves towards stationary source with velocity ' $\mathrm{V}_1$ ', the apparent frequency of emitted note is ' $F_1$ '. When observer moves away from the source with velocity ' $\mathrm{V}_1$ ', apparent frequency is ' $F_2$ '. If V is the velocity of sound in air and $\frac{F_1}{F_2}=2$ then $\frac{V}{V_1}$ is

A
,2
B
3
C
4
D
5
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