Q. If you set up the seventh harmonic on a string fixed at both ends, how many nodes and antinodes are set up in it
A) $8,7$
B) $7,7$
C) $8,9$
D) $9,8$
Explanation
(a) String will vibrate in 7 loops so it will have 8 nodes 7 antinodes.
Number of harmonics = Number of loops = Number of antinodes $\Rightarrow$ Number of antinodes = 7
Hence number of nodes = Number of antinodes + 1
$= 7 + 1 = 8$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.