The SI unit of frequency is
second
meter
hertz
meter per second
The S.I unit of Specific resistance (or) resistivity is
ohm/metre
ohm-metre
ohm
Ohm-Metre
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
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
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 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 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
Hz is the unit of
wavelength
amplitude
frequency
time period
A noise level of 100 decibel would correspond to :
just audible sound
ordinary conversation
sound from a noisy street
noise from a machine shop
