Looking for classes? Ksquare Career Institute, Bengaluru →
Waves
Vibration of strings - fundamental frequency and length
1 question from 1 paper, each with its answer.
- question
- 1
- paper
- 1
- years asked, 2017–2026
- 1 of 10
- of Waves
- 1.69%
Concepts tested
- Vibration of strings - fundamental frequency and length
All Questions
2020 Phase-2 1 question
-
The length of the string of a musical instrument is 90 cm and has a fundamental frequency of 120 Hz. Where should it be pressed to produce fundamental frequency of 180 Hz?For a stretched string, fundamental frequency $f\propto\dfrac{1}{l}$ (same tension and mass per unit length), so $f_1l_1=f_2l_2\Rightarrow120\times90=180\times l_2\Rightarrow l_2=60$ cm.