NEET Physics Waves Questions Solved

Watch Physics > Waves Videos
play button
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

       v=12lTm

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

From Eq. (i)

l1=kv1,l2=kv2,l3=kv3

Original length

l=kv

Here,     l=l1+l2+l3

            kv=kv1+kv2+kv3

            1v=1v1+1v2+kv3

Difficulty Level:

  • 10%
  • 19%
  • 62%
  • 11%
Crack NEET with Online Course - Free Trial (Offer Valid Till September 24, 2019)