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PHYSICS MCQ

Sound · ICSE STD 9 (ICSE - English Medium). 11 questions.

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11 questions · timed · auto-graded

MCQ 11 Mark
Which of the following is an elastic wave?
  • A
    light wave
  • B
    ratio wave
  • ✓
    sound wave
  • D
    microwave
Answer
Correct option: C.
sound wave
c
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MCQ 21 Mark
If the frequency of a wave is 25 Hz . the total number of compressions and rarefactions passing through a point in 1 second is:
  • A
    25
  • ✓
    50
  • C
    100
  • D
    none of these
Answer
Correct option: B.
50
b
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MCQ 41 Mark
The number of oscillations passing through a point in unit time is called:
  • A
    vibration
  • ✓
    frequency
  • C
    wavelength
  • D
    amplitude
Answer
Correct option: B.
frequency
b
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MCQ 51 Mark
The wavelength is the linear distance between the:
  • A
    two consecutive compressions
  • B
    two consecutive rarefactions
  • C
    one compression and one rarefaction
  • ✓
    both (a) and (b)
Answer
Correct option: D.
both (a) and (b)
d
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MCQ 61 Mark
In the region of compression or rarefaction, in a longitudinal wave, the physical quantity which does not change is:
  • A
    pressure
  • ✓
    mass
  • C
    density
  • D
    volume
Answer
Correct option: B.
mass
b
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MCQ 71 Mark
A part of longitudinal wave in which particles of the medium are farther away than the normal particles is called:
  • ✓
    rarefaction
  • B
    trough
  • C
    compression
  • D
    crest
Answer
Correct option: A.
rarefaction
a
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MCQ 81 Mark
A part of the longitudinal wave in which particles of the medium are closer than the normal particles is called:
  • A
    rarefaction
  • B
    crest
  • C
    trough
  • ✓
    compression
Answer
Correct option: D.
compression
d
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MCQ 91 Mark
The longitudinal waves can propagate only in .
  • A
    solids
  • B
    liquids
  • C
    gases
  • ✓
    all of these
Answer
Correct option: D.
all of these
d
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MCQ 101 Mark
A longitudinal wave consists of:
  • A
    crest and trough in the medium
  • ✓
    compression and rarefaction in the medium
  • C
    both (a) and (b)
  • D
    neither (a) nor (b)
Answer
Correct option: B.
compression and rarefaction in the medium
b
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MCQ 111 Mark
In case of longitudinal waves, the particles of the medium vibrate:
  • ✓
    in the direction of wave propagation
  • B
    opposite to the direction of wave propagation
  • C
    at right angles to the direction of wave propagation
  • D
    none of the above
Answer
Correct option: A.
in the direction of wave propagation
a
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MCQ - PHYSICS STD 9 Questions - Vidyadip