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Science M.C.Q. [I MARKS]

Sound · Jharkhand Board (JAC) STD 8 (Jharkhand - English Medium). 20 questions.

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M.C.Q. [I MARKS]

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20 questions · auto-graded multiple-choice test.

MCQ 11 Mark
Which of the following frequency of sound can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros?
  • A
    $5 kHz.$
  • B
    $25 Hz.$
  • ✓
    $10 Hz.$
  • D
    $15,000 Hz.$
Answer
Correct option: C.
$10 Hz.$
$10\ Hz$ can be generated by a vibrating simple pendulum as well as by the vibrating vocal cords of a rhinoceros.
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MCQ 21 Mark
A key of mechanical piano is first struck gently and then struck again but much harder this time. In the second case:
  • ✓
    Sound will be louder but pitch will not be different.
  • B
    Sound will be louder and the pitch will also be higher.
  • C
    Sound will be louder but pitch will be lower.
  • D
    Both loudness and pitch will remain unaffected.
Answer
Correct option: A.
Sound will be louder but pitch will not be different.
Explanation:
In the second case sound will be louder but pitch will not be different.
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MCQ 31 Mark
When we change a feeble sound to a loud sound, we increase its:
  • A
    Frequency.
  • ✓
    Amplitude.
  • C
    Speed.
  • D
    Timbre.
Answer
Correct option: B.
Amplitude.
Amplitude.
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MCQ 41 Mark
he velocities of sound waves in four media $P, Q, R$ and $S$ are $18,000km/h, 900km/h, 0 km/h$, and $1200km/h$ respectively. Which medium could be a liquid substance?
  • A
    $P.$
  • B
    $Q.$
  • C
    $R.$
  • ✓
    $S.$
Answer
Correct option: D.
$S.$
Because the speed of sound in liquids is more than gas but less than solids.
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MCQ 51 Mark
The frequencies of four sound waves are given below. Which of these sound waves can be used to measure the depth of sea?
  • A
    $15,000\ Hz.$
  • B
    $10\ kHz.$
  • ✓
    $50\ kHz.$
  • D
    $10,000\ Hz.$
Answer
Correct option: C.
$50\ kHz.$
The ultrasound waves can be used to measure the depth of sea.
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MCQ 61 Mark
Which of the following modes is utilized in the production of sound by humans?
  • A
    Vibrating membranes.
  • B
    Vibrating plates.
  • ✓
    Vibrating strings.
  • D
    Vibrating air columns.
Answer
Correct option: C.
Vibrating strings.
Explanation:
The vibrating strings modes is utilized in the production of sound by humans.
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MCQ 71 Mark
One of the following can hear infrasound. This one is:
  • ✓
    Dog.
  • B
    Bat.
  • C
    Rhinoceros.
  • D
    Humans.
Answer
Correct option: A.
Dog.
Explanation:
Dog can hear both the infrasound as well as ultrasound.
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MCQ 81 Mark
Voice of which of the following is likely to have the minimum frequency?
  • A
    Baby girl.
  • B
    Baby boy.
  • ✓
    A man.
  • D
    A woman.
Answer
Correct option: C.
A man.
Explanation:
The voice of man has the least frequency.
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MCQ 91 Mark
Which of the following vibrates when a musical note is produced by the cymbals in an orchestra?
  • A
    Stretched strings.
  • B
    Stretched membranes.
  • ✓
    Metal plates.
  • D
    Air columns.
Answer
Correct option: C.
Metal plates.
Explanation:
Metal plates vibrates when a musical note is produced by the cymbals in an orchestra.
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MCQ 101 Mark
Sound can travel through:
  • A
    Gases only.
  • ✓
    Solids only.
  • C
    Liquids only.
  • D
    Solids, liquids and gases.
Answer
Correct option: B.
Solids only.
Explanation:
Sound does not need any material medium to travel.
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MCQ 111 Mark
The ultrasound waves can penetrate into matter to a large extent because they have:
  • A
    Very high speed.
  • ✓
    Very high frequency.
  • C
    Very high quality.
  • D
    Very high amplitude.
Answer
Correct option: B.
Very high frequency.
Explanation:
The ultrasound waves can penetrate into matter to a large extent because they have very high frequency.
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MCQ 121 Mark
A musical instrument is producing a continuous note. This note cannot be heard by a person having a normal hearing range. This note must then be passing through:
  • A
    Water.
  • B
    Wax.
  • ✓
    Vacuum.
  • D
    Empty vessel.
Answer
Correct option: C.
Vacuum.
Explanation:
This note must then be passing through vacuum.
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MCQ 131 Mark
Before playing the orchestra in a musical concert, a sitarist tries to adjust the tension and pluck the strings suitably. By doing so he is adjusting:
  • A
    Intensity of sound only.
  • B
    Amplitude of sound only.
  • ✓
    Frequency of the sitar string, with the frequency of other musical instruments.
  • D
    Loudness of sound.
Answer
Correct option: C.
Frequency of the sitar string, with the frequency of other musical instruments.
Explanation:
He is adjusting the frequency of the sitar string, with the frequency of other musical instruments.
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MCQ 141 Mark
The maximum speed of vibrations which produce audible sound will be in:
  • A
    Dry air.
  • B
    Sea water.
  • ✓
    Ground glass.
  • D
    Human blood.
Answer
Correct option: C.
Ground glass.
Explanation:
The sound travels faster in solids than liquids than gases.
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MCQ 151 Mark
The sound waves travel fastest:
  • ✓
    In solids.
  • B
    In liquids.
  • C
    In gases.
  • D
    In vacuum.
Answer
Correct option: A.
In solids.
Explanation:
The sound travels faster in solids than liquids than gases.
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MCQ 161 Mark
Which of the following sound frequencies can be heard by a woman having a normal hearing range?
$A. 25000Hz.$
$B. 15kHz.$
$C. 40000Hz.$
$D. 25Hz.$
  • A
    $A$ and $B$
  • B
    $B$ and $C$
  • C
    $B$ and $D$
  • ✓
    Only $D$
Answer
Correct option: D.
Only $D$
$25Hz$ because the human audible range is $20Hz$ to $20,000Hz.$
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MCQ 171 Mark
The speeds of sound in four different media are given below. Which of the following is the most likely speed in m/s with which the two under water whales in a sea talk to each other when separated by a large distance?
  • A
    $340$
  • B
    $5170$
  • C
    $1280$
  • ✓
    $1530$
Answer
Correct option: D.
$1530$
$1530$
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MCQ 181 Mark
The speed of highly penetrating ultrasonic waves is:
  • A
    Lower than those of audible sound waves.
  • B
    Higher than those of audible sound waves.
  • C
    Much higher than those of audible sound waves.
  • ✓
    Same as those of audible sound waves.
Answer
Correct option: D.
Same as those of audible sound waves.
Explanation:
The speed of sound waves is same in a particular medium.
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MCQ 191 Mark
We can distinguish between the musical sounds produced by different singers on the basis of the characteristic of sound called:
  • A
    Frequency.
  • ✓
    Timbre.
  • C
    Pitch.
  • D
    Loudness.
Answer
Correct option: B.
Timbre.
Explanation:
Timbre can distinguish between the musical sounds produced by different singers on the basis of the characteristic of sound.
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MCQ 201 Mark
Which of the following are used to study the growth of fetus inside the mother’s womb?
  • A
    Radio waves.
  • B
    $X$-rays.
  • ✓
    Infrared waves.
  • D
    Sound waves.
Answer
Correct option: C.
Infrared waves.
Infra-red Waves are used to study the growth of fetus inside the mother’s womb.
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