Question

How many nodes and antinodes are there in a tuning fork?

• A. 6
• B. 5
• C. 3
• D. 4

Answer 1

The correct option is D 4

Answer is D.
Tuning forks produce two loud tones, a low pitch note, its fundamental, which is the one it is labeled as producing, and a higher pitch note known as the "clang" tone. The high pitch clang tone is over six times higher in frequency than the fundamental tone of the tuning fork.
The stem of the tuning fork is an antinode of vibration for the fundamental frequency, it is a node for the clang tone.
If we strike it against the ground and listen to it vibrate with our ear near the ends of the two tines, then move our ear down the gap between the tines toward the stem. we will hear the fundamental loudest near the ends of the times then as we progress toward the stem the fundamental will fade away and we will hear the clang tone. The ends of the tines are the antinodes of the fundamental and the clang tone, but as we move down the gap a bit we come to a place which is the node of motion for the clang tone.
Hence, there are 4 nodes and antinodes in a tuning fork.