Wave Motion 2 Question 12
12. A sonometer wire of length is made of steel. The tension in it produces an elastic strain of . What is the fundamental frequency of steel if density and elasticity of steel are and respectively?
(a)
(b)
(c)
(d)
(2013 Main)
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Answer:
Correct Answer: 12. (b)
Solution:
- Fundamental frequency of sonometer wire
Here,
Also, Young’s modulus of elasticity
After substituting the values we get,