NEET Physics Waves Questions Solved

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NEET - 2012

When a string is divided into three segments of lengths l1, l2 and l3, the fundamental frequencies of these three segments are v1, v2 and v3 respectively. The original fundamental frequency (v) of the string is 

(a) v=v1+v2+v3

(b) v=v1+v2+v3

(c) 1v=1v1+1v2+1v3

(d) 1v=1v1+1v2+1v3

The fundamental frequency of string


             v1l1= v2l2= v2l3=k                        ...(i)

From Eq. (i)


Original length


Here,     l=l1+l2+l3



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