Question

What is the smallest frequency at which the string can be moved to produce any standing wave?

Answer 1

v/2l the first harmonic of the wave.

Step-by-step explanation:

Since the first harmonic of standing wave is produced when the wavelength is double of the string length, so that crest and trough of the wave falls over one another to form a standing wave.

As v=fλ and λ=2L (L being the length of the string)

so, f=v/2L

Answer 2

The first harmonic would be the smallest frequency for a string to produce a standing wave. In addition, the strings were fixed in a single attachment and have only limited motion. It is because standing waves require a specific medium for the sound to travel in it.