Question

A string has a length of 5m between fixed points and has fundamental frequency of 20 Hz. What is the frequency of the second overtone ?

• A. 30 Hz
• B. 40 Hz
• C. 50 Hz
• D. 60 Hz

Answer 1

Answer: (D)

60 Hz

Answer 2

Given,
Length of string between fixed ends $=5 m$
Fundamental frequency $\left(f_{0}\right)=20 \,Hz$
For second overtone, $n=3$
$\therefore\, f_{3} =3 f_{0}$
$=3 \times 20$
$=60 \,Hz$