Question

How many nodes and antinodes are there in a tuning fork?
(A) 6
(B) 5
(C) 3
(D) 4

Answer 1

Hint
The tuning fork is an acoustic device. It consists of two-pronged arms which are joined in the U shape. The tuning fork produces the waves of specific pitch and frequency. It is used to calibrate the musical instruments. The tuning forks are made of the metals.

Complete step by step answer
Let us vibrate a string fixed at both ends. The waves are produced between the fixed ends. There may be many waves, but the endpoints remain fixed. The waves' position, at which the amplitude of the wave is minimum, is called nodes, and the position corresponding to maximum amplitude is called antinodes.
The tuning fork consists of two arms, which act as the antinode, and the common point is called a node. The lengths of the wires in the musical instruments are adjusted so that the vibration frequency matches the frequency of the tuning fork because the tuning fork produces a perfect wave.
Therefore, the tuning fork produces four nodes and four antinodes, and the option (D) is correct.

Note
The frequency corresponding maximum wavelength of the wave is called the fundamental frequency of the string's vibration. The frequencies corresponding to nodes and antinodes are called the tones. The tones corresponding to nodes are called low pitch notes, and that corresponding to antinodes are high pitch tones. The frequency of the notes depends on the length of the string. Be careful to adjust the length of the wires in a musical instrument to calibrate the musical instrument by the tuning fork.