| Direction: Read the passage carefully and answer the following question. |
| Two tuning forks, A and B vibrate with frequencies in the ratio 2 : 7 and their wavelengths in the ratio 3 : 4 respectively. Both the tuning forks are placed in different media. |
A) Tuning fork A
B) Tuning fork B
C) Both produce sound of same velocity
D) Cannot say
Correct Answer: B
Solution :
Given, \[\frac{{{v}_{A}}}{{{v}_{B}}}=\frac{2}{7}\] ?(i) And \[\frac{{{\lambda }_{A}}}{{{\lambda }_{B}}}=\frac{3}{4}\] ?(ii) \[\because \] Velocity of sound, \[v=\lambda v\] Multiplying (i) and (ii), we get \[\frac{{{V}_{A}}}{{{V}_{B}}}=\frac{6}{28}=\frac{3}{14}\] \[\therefore \] Velocity of sound produced by tuning fork B is greater.
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