When the antinodes, in stationary waves, are passing through their equilibrium position, the energy is:
Correct answer: B. Kinetic only
- A. Potential only
- B. Kinetic only
- C. A combination of both forms of energy
- D. There is no energy in stationary waves
Explanation
There is no energy transfer in stationary waves, but the energy of the antinodes keeps on changing from potential to kinetic energy. At the complete stretched position, the energy is wholly potential but as it passes through the equilibrium position, it is kinetic only.
This question appeared on the NUMS 2020 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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