Indian army has published the notification for SSC Tech 56 men and SSC Tech 27 women for the course commencing at OTA Chennai from April 2021
The hearing range of human ear is
20 Hz 20k Hz
less than 20 Hz
more then 20 Hz
20Hz to 25000 Hz
Ultrasound has frequency of vibration
Between 20 and 20000 Hz
Below 20 Hz
Above 20000 Hz
Between 500 and 10000 Hz
The ultrasound waves can penetrate into matter to your large extent because they have
Very high frequency
Very high speed
Very high quality
Very high amplitude
The maximum displacement of vibrating body from its mean position is called
Frequency
Time period
Amplitude
None of this
Frequency is expressed in
hertz
Meter
Newton
Joule
