If a wave completes 20 vibrations in 2.5 s, then its frequency is
8 Hz
20 Hz
50 Hz
200 Hz
Sonar makes use of the
infrasonic sound
ultrasound
ordinary sound
light
When the same note is played on a sitar and a flute, the sound produced can be distinguished from each other because of the difference in :
pitch, loudness and quality
pitch and loudness
quality only
loudness only
The ultrasound waves can penetrate into matter to a large extent because they have
very high speed
very high frequency
very high wavelength
very high amplitude
A bat can hear sound at frequency up to 120 kHz. Determine the wavelength of sound in air at this frequency. Take the speed of sound in air to be 344 m/s.
2.87 mm
2.56 mm
3.58 mm
2.42 mm
A sound wave travels at a speed of 330 m/s. If its wavelength is 1.5 cm, calculate the frequency of the sound wave.
22 kHz
30 kHz
10 kHz
35 kHz
Hz is the unit of
wavelength
frequency
time period
amplitude
Jaltarang is a
stringed instrument
wind instrument
percussion instrument
mixed instrument
Sound is a form of
force
power
tendency
energy
Which kind of sound is produced in an earthquake before the main shock wave begins?
infrasound
audible sound
none of the above
