Question

A string fixed at both ends is vibrating in seventh harmonic. How many nodes and antinodes are set up in it respectively?

• A. $8,7$
• B. $7,7$
• C. $8,9$
• D. $9,8$

Answer 1

The correct option is A $8,7$

For a string fixed at both ends, $7^{th}$ harmonic means that string is vibrating with 7 loops.


A single loop consists of 2 nodes and 1 antinode.
Hence, there will be 7 antinodes and 8 nodes in seventh harmonic.