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
Which of the following is carried by the waves from one place to another?
mass
velocity
wavelength
energy
The S.I unit of Specific resistance (or) resistivity is
ohm/metre
ohm-metre
ohm
Ohm-Metre
Sound waves travel with a speed of 346 m/s in air. What is the wavelength of sound whose frequency is 692 Hz?
0.5 m
5 m
0.05 m
50 m
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 instrument used in the laboratory to produce sound of a fixed frequenncy is
simple pendulum
thermometer
meter scale
tuning fork
The example of a stringed instrument is
tabla
flute
mouthorgan
violin
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
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
If 15 waves are produced per second, what is the frequency?
20 Hz
30 Hz
15 Hz
1/15 Hz
