Question Text
Question 3 :
A bat emits an ultrasonic sound of frequency 0.25 MHz. Calculate the time in which one vibration is completed.
Question 5 :
The number of oscillations passing through a point in unit time is called :
Question 7 :
In the region of compression or rarefaction, in a longitudinal wave, the physical quantity which does not change is :
Question 8 :
A part of longitudinal wave in which particles of the medium are farther away than the normal particles is called :
Question 11 :
In case of longitudinal waves, the particles of the medium vibrate :
Question 17 :
If the frequency of a wave is 25 Hz. the total number of compressions and rarefactions passing through a point in 1 second is :
Question 19 :
A part of the longitudinal wave in which particles of the medium are closer than the normal particles is called :