Question

Waves of frequency 100 Hz are produced in a string as shown in
the figure.

Give its: (A) amplitude (B) wavelength (C) velocity (D) nature​

Answer 1

Amplitude, A = 5 cm

Wavelength, $\lambda=20\ cm$

Velocity, v = 20 m/s

Explanation:

Frequency of the wave, f = 100 Hz

We need to find the amplitude, wavelength, velocity and nature of wave.

(a) The maximum displacement of a wave is called its amplitude. According to the attached figure, the amplitude of the wave is 5 cm.

(b) The distance between two consecutive crest and trough is called wavelength of a wave. According to the figure, wavelength of the wave is 20 cm or 0.2 m.

(c) The velocity of a wave is given by :

$v=f\lambda$

$v=100\times 0.2$

v = 20 m/s

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Waves

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