The frequency of fundamental mode of a string stretched by a tension T and gaming mass m and length l is given by:
Correct answer: B. f = 1/2l√lT/m = 1/2l √lT/m
- A. f = 1⁄2 √T/ml
- B. f = 1/2l√lT/m = 1/2l √lT/m
- C. f = 1/2l√T/m
- D. f = 1/2√T/m
Explanation
Frequency is directly proportional to tension and inversely with mass . Formula from SHM.
This question appeared on the ETEA MDCAT 2008 paper, which you can sit online with every answer explained.
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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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