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Question

If you set up the seventh harmonic on a string fixed at both ends, how many 

nodes and antinodes are set up in it

[AMU 2000]


  1. 8, 7

  2. 7, 7

  3. 8, 9

  4. 9, 8


Solution

The correct option is A

8, 7


String will vibrate in 7 loops so it will have 8 nodes 7 antinodes.

Number of harmonics = Number of loops 

 Number of antinodes = 7 

Hence number of nodes = Number of antinodes + 1

 =7+1=8

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