A stationary wave is set up in the air column of a closed pipe. At the closes end of the pipe _____________________?
Correct answer: A. always an node in formed
- A. always an node in formed
- B. always an antinode is formed
- C. neither node nor antinode is formed
- D. sometimes a node and sometimes an antinode is formed
Explanation
At the closed end of an air column, the air cannot move, so the displacement is always zero and a displacement node forms. Pressure variation is maximum there, but the standard answer refers to displacement. The likely mistake is choosing an antinode by confusing the pressure pattern with the displacement pattern.
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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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