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Sounds waves and Motion MCQ question and answer with solution | Physics Gk MCQs

Learn Sounds waves and Motion MCQ Questions and answers with easy and logical explanations in Physics Gk . Sounds waves and Motion MCQ question provides all type of technical mcq questions which is important for SSC-CGL, UPPSC, NDA, CDS and all govt examinations Page-10 section-2

Each section contains 100 MCQs on Sounds waves and Motion .
91
The speed of a body that has mach number more than 1 is
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Answer & Solution
Answer: Option A
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92
A wave has a frequency of 50 Hz and a speed of 36m/s. What is the wavelength of this wave?
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Answer: Option D
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93
Match the following-
(Electromagnetic Waves) (Uses)
(P) Radio waves - (i) Remote switch of household electronic
(Q) Micro waves - (ii) Radar system used in aircraft
(R) Navigation Infrared Rays - (iii) Cellular Phones
(S) Gamma rays in cancer - (iv) Medicine to destroy cells
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Answer: Option C
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94
Which of the following statements is true about the speed of sound in different mediums at 25°C?
A. Speed of sound in steel is 5960 km/s.
B. The speed of sound in nickel is 6040 m/s.
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Answer: Option A
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95
Which of the following represents the decibel level of rustling of tree leaves in normal circumstance?
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Answer: Option A
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96
By which a sound is reflected from a distance of at least 17m (approx) . . . . . . . . happens.
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Answer: Option C
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97
The sensation of sound persists in the human brain for about:
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Answer: Option C
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98
Which one of the following animals can hear ultrasonic sound?
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Answer: Option D
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99
Which colour has the shortest wavelength?
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Answer: Option D
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100
Match the columns.
List-I List-II
a. Audible waves 1. below 20 Hz
b. Infrasonic waves 2. 20 Hz to 20,000 Hz
c. Ultrasonic waves 3. above 20,000 Hz
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Answer: Option C
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