An Assertion and a Reason are given belowAssertion: When a velocity is kept constant and wavelength is halved, then the frequency is doubledReason: Velocity = Frequency × Wavelength
A. Both assertion and reason are true and reason is the correct explanation of assertion
B. Both assertion & reason are true but reason is not the correct explanation of assertion
C. Both assertion and reason are false
D. Assertion is true but the reason is false
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What is the distance between a crest and a consecutive trough in a transverse wave?
A. Wavelength
B. Amplitude
C. Half of the wavelength
D. Twice of wavelength
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Which of the following statements is not correct regarding the travel of sound waves?
A. Sound waves can travel through water
B. Sound waves can travel throught air
C. Sound waves can travel through steel
D. Sound waves can travel through vacuum
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Which one of the following statements is not correct?
A. The velocity of sound in air is independent of pressure
B. The velocity of sound in air increases with increase of temperature
C. The velocity of sound in air decreases as the humidity increases
D. The velocity of sound in air is not affected by the change in amplitude and frequency
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A boat at anchor is rocked by waves whose consecutive crests are 125 m apart. The velocity of the wave of moving crests is 25 ms-1 . What is the frequency of the rocking of the boat?
A. 0.20 Hz
B. 625 hertz
C. 100 Hz
D. 250 Hz
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Sound waves travel fastest in
A. Solids
B. Liquids
C. Gases
D. Vacuum
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The restoring force of SHM is maximum when particle
A. displacement is maximum
B. is half way between the mean and extreme position
C. crosses mean position
D. is at rest
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Which one of the following wave does not belong to the category of the other three?
A. X-rays
B. Microwaves
C. Radiowaves
D. Sound waves
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. . . . . . . . are harmful radiation emitted by the Sun-
A. Gamma rays
B. UV radiation
C. Infrared radiation
D. Alpha ray
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Ultrasonics are sound waves of frequency
A. Greater than 20,000 Hz
B. Less than 10,000 Hz
C. Equal to 1000 Hz
D. None of the above
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A transmission station transmits waves with a frequency of 71 × 104 Hz and a speed of 3 × 108 m per second. The wavelength of waves is
A. 417.8 meters
B. 208.4 meters
C. 422.5 meters
D. 324.6 meters
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Which of the following waves include compression and spillage response-
A. Longitudinal wave
B. Light wave
C. Electromagnetic wave
D. Transverse wave
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The sound will have the highest velocity in
A. vacuum
B. air
C. water
D. steel
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Due to which phenomena sound is heard at longer distance in nights than in day.
A. Reflection
B. Refraction
C. Interference of sound
D. Diffraction of sound
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Which of the following statements are true/false about the speed of sound in different mediums at 25°C?
A. Only A is correct
B. Both A and B are correct
C. Only B is correct
D. Neither A nor B is correct
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In progressive wave,
A. all particles of the medium vibrate
B. the amplitude of vibration is the same for all particle
C. the amplitude of vibration is different from one particle to another particle
D. Both A and B
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Decibel is a term connected with
A. air
B. water
C. sound
D. soil
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To detect the obstacles in their path, bats produce . . . . . . . .
A. electromagnetic waves
B. radio waves
C. ultrasonic waves
D. supersonic waves
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Waves produced at the bottom of the sea due to an explosion are . . . . . . . .
A. both, transverse and longitudinal
B. longitudinal
C. transverse
D. stationary
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The speed of sound in air at 0°C is
A. 330 ms
B. 331 ms-1
C. 330 ms-1
D. 331 ms
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