In vibrating cord the points where the amplitude is maximum, are called ___________________?
Correct answer: A. antinodes
- A. antinodes
- B. nodes
- C. troughs
- D. crests
Explanation
In a stationary wave, an antinode is a point where the particles vibrate with maximum amplitude, while a node remains at zero amplitude. Troughs and crests describe positions in a travelling wave, not the fixed maximum-amplitude points of a stationary wave. The likely mistake is choosing crests because they are also points of maximum displacement in a snapshot of a travelling wave.
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About Stationary Waves
Stationary waves form when two waves of the same frequency and amplitude travel in opposite directions and interfere. The topic covers nodes, antinodes, wavelength, phase, resonance, and the allowed frequencies on strings and in air columns. Unlike progressive waves, stationary waves do not transfer energy from one point to another.
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