Question
1
|
Question: When a wave travels
through a medium ______.
1.
|
particles are transferred from one
place to another
|
2.
|
energy is transferred in a
periodic manner
|
3.
|
energy is transferred at a
constant speed
|
4.
|
none of the above statements is
applicable
|
Answer: 3
Question
2
Question: The minimum distance
between the source and the reflector, so that an echo is heard is approximately
equal to ______.
1.
|
10 m
|
2.
|
17 m
|
3.
|
34 m
|
4.
|
50 m
|
Answer: 2
Question
3
Question: Bats detect the
obstacles in their path by receiving the reflected ______.
1.
|
infrasonic waves
|
2.
|
radio waves
|
3.
|
electro-magnetic waves
|
4.
|
ultrasonic waves
|
Answer: 4
Question
4
Question: When sound travels
through air, the air particles ______.
1.
|
vibrate along the direction of
wave propagation
|
2.
|
vibrate but not in any fixed
direction
|
3.
|
vibrate perpendicular to the
direction of wave propagation
|
4.
|
do not vibrate
|
Answer: 1
Question
5
Question: The relation between
wave velocity 'v', frequency 'f ', and wavelength 'l' is ______.
Answer: v x l = f
Question
6
Question: The frequency of a wave
travelling at a speed of 500 ms-1 is 25 Hz. Its time period will be
______.
1.
|
20 s
|
2.
|
0.05 s
|
3.
|
25 s
|
4.
|
0.04 s
|
Answer: 4
Question
7
Question: The amplitude of a wave
is ______.
1.
|
the distance the wave moves in one
second
|
2.
|
the distance the wave moves in one
time period of the wave
|
3.
|
the maximum distance moved by the
medium particles on either side of the mean position
|
4.
|
the distance equal to one wave
length
|
Answer: 3
Question
8
Question: Which of the following
is not a characteristic of a musical sound?
1.
|
Pitch
|
2.
|
Wavelength
|
3.
|
Quality
|
4.
|
Loudness
|
Answer: 2
Question
9
Question: Sound waves do not
travel through
1.
|
solids
|
2.
|
liquids
|
3.
|
gases
|
4.
|
vacuum
|
Answer: 4
Question
10
Question: The physical quantity,
which oscillates in most waves, is
1.
|
mass
|
2.
|
energy
|
3.
|
amplitude
|
4.
|
wavelength
|
Answer: 3
Question
11
Question: Sound waves are
1.
|
longitudinal
|
2.
|
transverse
|
3.
|
partly longitudinal and partly
transverse
|
4.
|
sometimes longitudinal and
sometimes transverse
|
Answer: 1
Question
12
Question: The frequency which is
not audible to the human ear is
1.
|
50 Hz
|
2.
|
500 Hz
|
3.
|
5000 Hz
|
4.
|
50000 Hz
|
Answer: 4
Question
13
Question: The speed of sound in
medium depends upon
1.
|
amplitude
|
2.
|
frequency
|
3.
|
wavelength
|
4.
|
properties of the medium
|
Answer: 4
Question
14
Question: Which of the following
will remain unchanged when a sound wave travels in air or in water?
1.
|
Amplitude
|
2.
|
Wavelength
|
3.
|
Frequency
|
4.
|
Speed
|
Answer: 3
Question
15
Question: A sound source sends
waves of 400 Hz. It produces waves of wavelength 2.5 m. The velocity of sound
waves is
1.
|
100 m/s
|
2.
|
1000 m/s
|
3.
|
10000 m/s
|
4.
|
3000 km/s
|
Answer: 2
Question
16
Question: The time period of a
vibrating body is 0.05 s. The frequency of waves it emits is
1.
|
5 Hz
|
2.
|
20 Hz
|
3.
|
200 Hz
|
4.
|
2 Hz
|
Answer: 2
Question
17
Question: A source of frequency
of 500 Hz emits waves of wavelength 0.4 m, how long does the waves take to
travel 600 m?
1.
|
3 s
|
2.
|
6 s
|
3.
|
9 s
|
4.
|
12 s
|
Answer: 1
Question
18
Question: Sound and light waves
both
1.
|
have similar wavelength
|
2.
|
obey the laws of reflection
|
3.
|
travel as longitudinal waves
|
4.
|
travel through vacuum
|
Answer: 2
Question
19
Question: The method of detecting
the presence, position and direction of motion of distant objects by reflecting
a beam of sound waves is known as _____.
1.
|
RADAR
|
2.
|
SONAR
|
3.
|
MIR
|
4.
|
CRO
|
Answer: 2
Question
20
Question: The technique used by
bats to find their way or to locate food is _______.
1.
|
SONAR
|
2.
|
RADAR
|
3.
|
Echolocation
|
4.
|
Flapping
|
Answer: 3
Question
21
Question: An ultrasonic wave is
sent from a ship towards the bottom of the sea. It is found that the time
interval between the sending and receiving of the wave is 1.6 s. What is the
depth of the sea, if the velocity of sound in the seawater is 1400 m/s?
1.
|
1120 m
|
2.
|
560 m
|
3.
|
1400 m
|
4.
|
112 m
|
Answer: 1
Question
22
Question: An example for
mechanical wave.
1.
|
Radio wave
|
2.
|
Light wave
|
3.
|
Infrared radiation
|
4.
|
Sound wave
|
Answer: 4
Question
23
Question: Which of the following
quantities is transferred during wave propagation?
1.
|
Speed
|
2.
|
Mass
|
3.
|
Matter
|
4.
|
Energy
|
Answer: 4
Question
24
Question: If a vibrator strikes
the water 10 times in one second, then the frequency of wave is _________.
1.
|
10 Hz
|
2.
|
0.5 Hz
|
3.
|
5 Hz
|
4.
|
0.1 Hz
|
Answer: 1
Question
25
Question: Unit of wavelength is
__________.
1.
|
newton
|
2.
|
erg
|
3.
|
dyne
|
4.
|
angstrom
|
Answer: 4
Question
26
Question: The distance between a
compression and the next rarefaction of a longitudinal wave is __________.
Ans: (lambda)/2
Question
27
Question: SI Unit of time period
is __________.
1.
|
second
|
2.
|
hour
|
3.
|
minute
|
4.
|
nanosecond
|
Answer: 1
Question
28
Question: The vibrations or the
pressure variations inside the inner ear are converted into electrical signals
by the_________.
1.
|
cochlea
|
2.
|
tympanic membrane
|
3.
|
pinna
|
4.
|
anvil
|
Answer: 1
Question
29
Question: Vibrations inside the
ear are amplified by the three bones namely the _________ in the middle ear.
1.
|
hammer, anvil and stirrup
|
2.
|
hammer, anvil and pinna
|
3.
|
hammer, cochlea and stirrup
|
4.
|
auditory bone, anvil and stirrup
|
Answer: 1
Question
30
Question: The persistence of
audible sound due to the successive reflections from the surrounding objects even
after the source has stopped to produce that sound is called _________.
1.
|
reflection
|
2.
|
echo
|
3.
|
reverberation
|
4.
|
rarefaction
|
Answer: 3
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