41. When a wave passes from one medium to another, there is change in
(a) frequency and velocity
(b) frequency and wavelength
(c) wavelength and velocity
(d) frequency, wavelength and velocity

42. A fork gives 5 beats with a 40 cm length of sonometre wire. If the length ofthe wire is shortened by 1 cm, the number of beats is still the same. The frequency of the fork is
(a) 385 Hz
(b) 600 Hz
(c) 395 Hz
(d) 400 Hz

Dear Student ,
Here is link for the question number 42 which will help you to solve this question with proper explanation .


  • 0
Solve qus no. 42
  • 0
Please find this answer

  • 1
What are you looking for?