Page 2 - first_project_testing

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14.An organ pipe P 1 closed at one end String fixed at both
vibrating in its first overtone and another ends
pipe P 2 open at both ends vibrating in its
third overtone are in resonance with a i a 320 Hz
given tuning fork. The ratio of lengths of
P 1 and P 2 is

A. 1 : 2 B. 1 : 3 C. 3 : 8 D. 3 : 4 String fixed at one

15.A resonance air column of length 20 cm end and free at other
resonates with a tuning fork of frequency end
250Hz. The speed of sound in air is ii b 480 Hz

A. 300 m/s B. 200 m/s C. 150 m/s
D. 75 m/s

16.The temperature at which the speed of Open organ pipe
sound in air becomes double its value at
0 o C is
iii c 640 Hz
A. 1092 o C B. 819K C. 819 o C
D. 546 o C

17.Sound velocity is maximum in Closed organ pipe

A. H 2 B. N 2 C. He D. O 2 iv. d 800 Hz

18.At which temperature the speed of sound
in hydrogen will be same as that of speed
of sound in oxygen at 100 o C

A. −148 o C B. −212.5 o C C. −317.5 o C A. i - ac, ii - bd, iii - ac, iv - bd
D. −249.7 o C B. i - ab, ii - bc, iii - cd, iv - ba
C. i - ad, ii - bc, iii - ab, iv - ba
19.The equation of displacement of two waves
are given as D. i - ad, ii - bd, iii - ac, iv - bc
y 1 = 10sin (3πt + π ; ) 21.A transverse wave is described by the
3
x
y 2 = 5[sin 3πt + √ 3 cos3πt] equation y = y 0 sin 2π(ft − λ . ) The
Then what is the ratio of their amplitudes maximum particle velocity is equal to four
times the wave velocity if
A. 1 : 2 B. 2 : 1 C. 1 : 1
D. None of these A. λ = π /4y o B. λ = π /2y o C. λ = πy o
D. λ = 2πy
20.In each of the four situations of column I a o
stretched string or an organ pipe is given 22.A pipe open at both ends has a
along with the required data. In case of fundamental frequency in air. The pipe is
f
strings the tension in string is dipped vertically in water, so that half of it
T = 102.4 N and the mass per unit length is in water. The fundamental frequency of
of string is 1 g/m. Speed of sound in air is the air column is now
320 m/s. Neglect end corrections. The
f
f
frequencies of resonance are given in A. B. 3f C. 2f D.
Column II. Match each situation in Column 2 4
I with the possible resonance frequencies 23.A string 2.0 m long and fixed at its ends is
given in Column II. driven by a 240 Hz vibrator. The string
Column- vibrates in its third harmonic mode. The
Column-I
II

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