Sound WavesHard
Question
Length of a sonometer wire is either 95 cm or 100 cm. In both the cases a tuning fork produceses 4 beats then the frequency of tuning fork is : -
Options
A.152
B.156
C.160
D.164
Solution
For sonometer wire
n × 100 = (n + 1) × 95
n = no of harmonics
⇒ n = 19
∴ f = 19
+ 4 = 20 
- 4 ⇒ L = 16
⇒ f = 20
- 4 = 156 Hz
n × 100 = (n + 1) × 95
n = no of harmonics
⇒ n = 19
∴ f = 19
+ 4 = 20 - 4 ⇒ L = 16⇒ f = 20
- 4 = 156 HzCreate a free account to view solution
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