Question

The frequency of the sound produced by a vibrating wire decreases if its length is increased. State whether true or false.

• A. True
• B. False

Answer 1

The correct option is A True

$v=f\lambda$

where,

$v\to$ Speed of the wave

$f\to$ Frequency of wave

$\lambda \to$ Wavelength

$\therefore f\alpha \frac{1}{\lambda }$

If frequency decreases, wavelength must increase. To increase the wavelength, the length of the wire must be increased.