Select Board & Class
E.g: 9876543210, 01112345678
We will give you a call shortly, Thank You
Office hours: 9:00 am to 9:00 pm IST (7 days a week)
Syllabus
Q). Derive relation for a wave.
(141) Draw a displacement time graph of a wave and mark on it the amplitude of wave by the letter 'a' and wavelength of the wave by the letter
Q.19. The figure shows a wave of frequency 1200 Hz spread over a length of 10 m. Whatis wavelength of the wave? What is speed of the wave?
[2 m, 600 Hz]
and density on the velocity of sound in air
Q.28. Velocity of sound in steel is 5000 . A sound wave of frequency 1000 Hz is produced in a steel rail of length 20 m. Calculate total number of waves produced in the rail.
[14 Waves]
Hru
c. A vibrating tuning fork is placed over the mouth of a burette filled with water. The tap is opened and water level gradually falls. It is observed that sound becomes the loudest for particular length of air column.
(i) Name the phenomenon occuring.
(ii) When does the sound become the loudest ?
(iii) Name the phenomenon occuring when sound produced is not the loudest.
Please help immediately tommorow is my exam...
My exam tomorrow
Q.14. Which of the following frequencies of sound you hear? 2 Hz, 400 Hz, 34000 Hz, Hz.