The S.I unit of Specific resistance (or) resistivity is
ohm/metre
ohm-metre
ohm
Ohm-Metre
Sonar makes use of the
infrasonic sound
ultrasound
ordinary sound
light
The SI unit of frequency is
second
meter
hertz
meter per second
A noise level of 100 decibel would correspond to :
just audible sound
ordinary conversation
sound from a noisy street
noise from a machine shop
Sound is a form of
force
power
tendency
energy
If 15 waves are produced per second, what is the frequency?
20 Hz
30 Hz
15 Hz
1/15 Hz
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
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
Audible frequency range is
20 Hz to 2 kHz
20 Hz to 200 Hz
20 Hz to 20 kHz
20 Hz to 200 kHz
