Physics NEET Practice Questions

बुद्धा साइन्स एंड टेक्निकल इंस्टीट्यूट
Buddha Science & Technical Institute
Kokar, Ranchi, Jharkhand
JOIN BSTI FOR : IIT-JEE / NEET With BHARAT SIR
PHYSICS : IMPORTANT QUESTION FOR IIT-JEE / NEET
Q. In a resonance tube with tuning fork of frequency 512 Hz, first
resonance occurs at water level equal to 30.3 cm and second
resonance occurs at 63.7 cm. The maximum possible error in the
speed of sound is
A. 51.2 cm / s B. 102.4 m / s
C. 204.8 cm / s D. 153.6 cm / s
ANS : C
V.V.I.
QUESTION

Q. In a wave motion y = a sin(kx – ωt), y can represent
A. Electric field
B. Magnetic field
C. Displacement
D. Pressure
ANS : A, B, C, D
V.V.I.
QUESTION

Q. Standing waves can be produced
A. On a string clamped at both the ends
B. On a string clamped at one end free at the other
C. When incident wave gets reflected from a wall
D. When two identical waves with a phase difference of π are
moving in the same direction
ANS : A, B, C
V.V.I.
QUESTION

Q. 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 if the
length of the column in cm is
A. 31.25 B. 62.50
C. 93.75 D. 125
ANS : A, C
V.V.I.
QUESTION

Q. Length of a string tied to two rigid supports is 40 cm. maximum
length (wavelength in cm) of a stationary wave produced on it is
A. 20 B. 80
C. 40 D. 120
ANS : B
V.V.I.
QUESTION

Q. Tube A has both ends open, while tube B has one end closed,
otherwise they are identical. The ratio of fundamental frequency of
tubes A and B is
A. 1 : 2 B. 1 : 4
C. 2 : 1 D. 4 : 1
ANS : C
V.V.I.
QUESTION

Q. When temperature increases, the frequency of a tuning fork
A. Increases
B. Decreases
C. Increases or decreases depending on the material
D. Remains the same
ANS : B
V.V.I.
QUESTION

Q. A sound absorber attenuates the sound level by 20 dB. The intensity
decreases by a factor of
A. 100
B. 1000
C. 10000
D. 10
ANS : A
V.V.I.
QUESTION

Q. The ratio of velocity of sound in hydrogen and oxygen at STP is
A. 16 : 1
B. 8 : 1
C. 4 : 1
D. 2 : 1
ANS : C
V.V.I.
QUESTION

Q. The disc of a siren containing 60 holes rotates at a constant speed of
360 rpm. The emitted sound is in unison with a tuning fork of
frequency
A. 10 Hz
B. 360 Hz
C. 216 Hz
D. 60 Hz
ANS : B
V.V.I.
QUESTION

Q. The quantity which does not change, when sound enters from one
medium to another
A. Wavelength
B. Speed
C. Frequency
D. None of these
ANS : C
V.V.I.
QUESTION

Q. An organ pipe of length ‘l’ vibrates in its fundamental mode. The
pressure vibration is maximum
A. at the two ends
B. At the distance l / 2 inside the ends
C. At the distance l / 4 inside the ends
D. At the distance l / 8 inside the ends
ANS : B
V.V.I.
QUESTION

Q. An organ pipe open at one is vibrating in first overtone and is in
resonance with another pipe open at both ends and vibrating in
third harmonic. The ratio of length of two pipes is
A. 1 : 2 B. 4 : 1
C. 8 : 3 D. 3 : 8
ANS : A
V.V.I.
QUESTION

Q. The velocity of sound in open ended tube is 330 m/s, the frequency
of wave is 1.1 kHz and length of tube is 30 cm, then number of
harmonics that it will emit be
A. 2 B. 3
C. 4 D. 5
ANS : A
V.V.I.
QUESTION

Q. Two waves are propagating with same amplitude and nearly same
frequency in opposite direction, they result in
A. Beats
B. Stationary wave
C. Resonance
D. Wave packet
ANS : B
V.V.I.
QUESTION

Q. A source emits a sound of frequency of 400 Hz, but the listener
hears it`s to be 390 Hz. Then
A. The listener is moving towards the source
B. The source is moving towards the listener
C. The listener is moving away from the source
D. The listener has a defective ear
ANS : C
V.V.I.
QUESTION

Q. The fractional change in wavelength of light coming from a star is
0.014%. What is its velocity ?
A. 4.2 x 103 m/s
B. 3.8 x 108 m/s
C. 3.5 x 103 m/s
D. 4.2 x 104 m/s
ANS : D
V.V.I.
QUESTION

Q. The phenomenon by which stars recede from each other is
explained by
A. Black hole theory
B. Neutron star theory
C. White dwarf
D. Red shift
ANS : D
V.V.I.
QUESTION

Q. Speed of recession of galaxy is proportional to its distance :
A. Directly
B. Inversely
C. Exponentially
D. None of these
ANS : A
V.V.I.
QUESTION

Q. The loudness and pitch of a sound note depends on
A. Intensity and frequency
B. Frequency and number of harmonics
C. Intensity and velocity
D. Frequency and velocity
ANS : A
V.V.I.
QUESTION

Q. Which is different from other by units ?
A. Phase difference
B. Mechanical equivalent
C. Loudness of sound
D. Poisson`s ratio
ANS : D
V.V.I.
QUESTION

Q. The waves produced by a motor boat sailing in water are
A. Transverse
B. Longitudinal
C. Longitudinal and transverse
D. Stationary
ANS : C
V.V.I.
QUESTION

Q. For a wave propagating in a medium, identify the property that is
independent of the others
A. Velocity
B. Wavelength
C. Frequency
D. All these depend on each other
ANS : C
V.V.I.
QUESTION

Q. If two sound waves having a phase difference of 60˚, then they will
have a path difference of
A. λ / 6
B. λ / 3
C. λ
D. 3 λ
ANS : A
V.V.I.
QUESTION

Q. Energy is not carried by which of the following wave ?
A. Stationary
B. Progressive
C. Transverse
D. Electromagnetic
ANS : A
V.V.I.
QUESTION

Q. If vibrations of string are to be increased by a factor 2, tension in
the string must be made
A. Half
B. Twice
C. Four times
D. Eight times
ANS : C
V.V.I.
QUESTION

Q. The tension in piano wire is 10 N. What should be the tension in the
wire to produce a note of double the frequency ?
A. 5 N
B. 20 N
C. 40 N
D. 80 N
ANS : C
V.V.I.
QUESTION

Q. The frequency of a tuning fork is 256. It will not resonate with a
fork of frequency
A. 256
B. 512
C. 738
D. 768
ANS : C
V.V.I.
QUESTION

Q. A uniform string is vibrating with a fundamental frequency ‘f’. The
new frequency, if radius and length both are doubled, would be
A. 2 f
B. 3 f
C. f / 4
D. f / 3
ANS : C
V.V.I.
QUESTION

Q. Which one of the following statements is true ?
A. Both light and sound waves can travel in vacuum
B. Both light and sound waves in air are transverse
C. The sound waves in air are longitudinal while the light waves are
transverse
D. Both light and sound waves in air are longitudinal
ANS : C
V.V.I.
QUESTION

Q. The velocity of sound in any gas depends upon
A. Wavelength of sound only
B. Density and elasticity of gas
C. Intensity of sound waves only
D. Amplitude and frequency of sound
ANS : B
V.V.I.
QUESTION

Q. The temperature at which the speed of sound becomes double as
was at 27˚C is
A. 273 ˚C
B. 0 ˚C
C. 927 ˚C
D. 1027 ˚C
ANS : C
V.V.I.
QUESTION

Q. Two sound waves having a phase difference of 60˚ have path
difference of
A. λ / 6
B. λ / 3
C. 2λ
D. λ / 2
ANS : A
V.V.I.
QUESTION

Q. Standing waves are produced in 10 m long stretched string. If the
string vibrates in 5 segments and wave velocity is 20 m/s, the
frequency is
A. 5 Hz B. 10 Hz
C. 2 Hz D. 4 Hz
ANS : A
V.V.I.
QUESTION

Q. A closed organ pipe (closed at one end) is excited to support the
third overtone. It is found that air in the pipe has
A. Three nodes and three antinodes
B. Three nodes and four antinodes
C. Four nodes and three antinodes
D. Four nodes and four antinodes
ANS : D
V.V.I.
QUESTION

Q. For production of beats the two sources must have
A. Different frequencies and same amplitude
B. Different frequencies
C. Different frequencies, same amplitude and same phase
D. Different frequencies and same phase
ANS : B
V.V.I.
QUESTION

Q. Two waves of lengths 50 cm and 51 cm produced 12 beats per sec.
The velocity of sound is
A. 340 m/s
B. 331 m/s
C. 306 m/s
D. 360 m/s
ANS : C
V.V.I.
QUESTION

Q. Light can travel in vacuum but not sound, because
A. Speed of sound is very slow than light
B. Light waves are electromagnetic in nature
C. Sound waves are electromagnetic in nature
D. None of these
ANS : A
V.V.I.
QUESTION

Q. Velocity of sound in air is
A. Faster in dry air than in moist air
B. Directly proportional to temperature
C. Directly proportional to pressure
D. None of these
ANS : B
V.V.I.
QUESTION

Q. If the density of oxygen is 16 times that of hydrogen, what will be
the corresponding ratio of their velocities of sound waves ?
A. 1 : 4
B. 16 : 1
C. 4 : 1
D. 1 : 16
ANS : A
V.V.I.
QUESTION

Q. At what temperature, the speed of sound in air will become double
of its value at 27˚C ?
A. 54 ˚C
B. 627 ˚C
C. 327 ˚C
D. 927 ˚C
ANS : D
V.V.I.
QUESTION

Q. When sound travels from air to water, which parameter does not
change ?
A. Wavelength
B. Frequency
C. Velocity
D. All of these
ANS : B
V.V.I.
QUESTION

Q. Number of beats between A and B is 5 Hz and between B and C is 3
Hz. Beat frequency between A and C may be
A. 1
B. 2
C. 8
D. None of these
ANS : B, C
V.V.I.
QUESTION

Q. Doppler`s effect in sound takes place when source and observer are
A. Stationary
B. Moving with same velocity
C. In relative motion
D. None of the these
ANS : C
V.V.I.
QUESTION

Q. The apparent frequency in Doppler`s effect does not depend upon
A. Speed of the observer
B. Distance between observer and source
C. Speed of the source
D. Frequency of the source
ANS : B
V.V.I.
QUESTION

Q. Source of sound and observer are moving towards each other, the
observer will hear
A. High frequency, high wavelength
B. Low frequency, low wavelength
C. High frequency, low wavelength
D. Low frequency, high wavelength
ANS : C
V.V.I.
QUESTION

Q. The pitch of a note depends upon its
A. Speed
B. Amplitude
C. Frequency
D. Wavelength
ANS : D
V.V.I.
QUESTION

Q. The two waves of the same frequency moving in the same direction
give rise to
A. Beats
B. Interference
C. Stationary waves
D. None of these
ANS : B
V.V.I.
QUESTION

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