In a vibrating cord the point where the particles are stationary is called:
Correct answer: C. Node
- A. Crest
- B. Anti-node
- C. Node
- D. Trough
Explanation
A node is a point along a standing wave where the wave has minimum amplitude. All the particles of the string execute SHM except nodes.
This question appeared on the ETEA MDCAT 2013 paper, which you can sit online with every answer explained.
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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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