1
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
The second overtone of an open organ pipe has the same frquency as the first overtone of a closed pipe L metre long. The length of the open pipe will be
A
L
B
2L
C
$${L \over 2}$$
D
4L
2
NEET 2016 Phase 2
MCQ (Single Correct Answer)
+4
-1
Three sound waves of equal amplitudes have frequencies (n $$-$$ 1), n, (n + 1). They superimpose to give beats. The number of beats produced per second will be
A
1
B
4
C
3
D
2
3
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
Out of Syllabus
A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of 15 m s$$-$$1. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is

(Take velocity of sound in air = 330 m s$$-$$1)
A
838 Hz
B
885 Hz
C
765 Hz
D
800 Hz
4
NEET 2016 Phase 1
MCQ (Single Correct Answer)
+4
-1
An air column, closed at one end open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm. The next larger length of the column resonating with the same tuning fork is
A
150 cm
B
200 cm
C
66.7 cm
D
100 cm
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