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Higher Study | Physics | Waves
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What happens if the reverberation time is too large?
ক
The sound becomes inaudible
খ
Echoes are produced
গ
Frequency becomes high
ঘ
The sound becomes infrasonic
In which medium sound travels faster?
ক
Solid
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Liquid
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Gas
ঘ
Water vapour
Which of the following represents the correct set of modulation classification?
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Frequency, time period
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Frequency, amplitude
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Amplitude, wavelength
ঘ
Wavelength, frequency
Ultrasonic waves are used for stirring liquid solutions because they
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do not produce noise during the operation
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are easy to produce
গ
can produce perfectly homogeneous solutions
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do not produce chemical reactions in the solution
Who invented Television?
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J L Baird
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Aristotle
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James Clerk Maxwell
ঘ
Nikola Tesla
Which of the following statements is not correct regarding the travel of sound waves?
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Sound waves can travel through water
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Sound waves can travel throught air
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Sound waves can travel through steel
ঘ
Sound waves can travel through vacuum
Sound above what level (in decibel) is considered hazardous noise pollution?
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30 dB
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100 dB
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80 dB
ঘ
120 dB
Resonance is an example of
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tuning fork
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forced vibration
গ
free vibration
ঘ
damped oscillation
Sound wave in air is
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transverse
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longitudinal
গ
electromagnetic
ঘ
polarised