1
MHT CET 2024 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A train sounding a whistle of frequency 510 Hz approaches a station at $72 \mathrm{~km} / \mathrm{hr}$. The frequency of the note heard by an observer on the platform as the train (1) approaches the station and then (2) recedes the station are respectively (in hertz) (velocity of sound in air $=320 \mathrm{~m} / \mathrm{s}$ )

A
$544,480$
B
$480,544$
C
$612,544$
D
$544,612$
2
MHT CET 2024 4th May Evening Shift
MCQ (Single Correct Answer)
+1
-0

A set of 28 turning forks is arranged in an increasing order of frequencies. Each fork produces ' $x$ ' beats per second with the preceding fork and the last fork is an octave of the first. If the frequency of the $12^{\text {th }}$ fork is 152 Hz , the value of ' $x$ ' (no. of beats per second) is

A
2
B
4
C
6
D
8
3
MHT CET 2024 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

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

A
$\frac{\pi}{3}$
B
$\frac{3}{\pi}$
C
$\frac{2}{\pi}$
D
$\frac{\pi}{2}$
4
MHT CET 2024 4th May Morning Shift
MCQ (Single Correct Answer)
+1
-0

The distance between two consecutive points with phase difference of $60^{\circ}$ in wave of frequency 500 Hz is 0.6 m . The velocity with which wave is travelling is

A
$1.8 \mathrm{~km} / \mathrm{s}$
B
$9 \mathrm{~km} / \mathrm{s}$
C
$3.6 \mathrm{~km} / \mathrm{s}$
D
$2.7 \mathrm{~km} / \mathrm{s}$
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