The frequency of ultrasonic vibrations is
more than 20000 Hz
between 20 and 10000 Hz
between 20 and 20000 Hz
less than 20 Hz
The pitch of a sound at a point depends on
the distance of the point from the source
the frequency of the sound
the amplitude of vibrations of the sound
velocity of sound in the medium
The speed of sound of a wave of frequency 200 Hz in air is 340 m/s. The speed of sound of wave of frequency 400 Hz in same air is
340 m/s
680 m/s
170 m/s
3 ×108m/s
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
loudness only
quality only
When a body vibrates with its natural frequency, the force acting on the body is
a constant force
proportional to its displacement
zero
proportional to its velocity
Sonar makes use of the
infrasonic sound
ultrasound
ordinary sound
light
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 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
The instrument used in the laboratory to produce sound of a fixed frequenncy is
simple pendulum
thermometer
meter scale
tuning fork
When a wave travels through a medium
energy is transferred in a periodic manner
particles are transferred from one place to another
energy is transferred at a constant speed
none of the above statement is applicable
