Physics 9702 · AS & A Level · Stationary waves

Stationary waves — practice question

One end of a string is clamped, while the opposite end is linked to a vibrator. The vibrator’s frequency is gradually raised from zero. This produces a sequence of stationary waves. Assume that point P is a node in a stationary wave. What are the first five wavelengths of the stationary waves that could be produced?

  • A$2\frac{L}{1},\ 2\frac{L}{2},\ 2\frac{L}{3},\ 2\frac{L}{4},\ 2\frac{L}{5}$
  • B$2\frac{L}{2},\ 2\frac{L}{3},\ 2\frac{L}{4},\ 2\frac{L}{5},\ 2\frac{L}{6}$
  • C$4\frac{L}{1},\ 4\frac{L}{2},\ 4\frac{L}{3},\ 4\frac{L}{4},\ 4\frac{L}{5}$
  • D$4\frac{L}{1},\ 4\frac{L}{3},\ 4\frac{L}{5},\ 4\frac{L}{7},\ 4\frac{L}{9}$

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