Class XI

: Waves produced on the surface of water are
  1. Longitudinal only
  2. Transverse waves only
  3. Electromagnetic Waves
  4. Both Longitudinal and Transversal
The quantity 1/λ is known as
  1. wave velocity
  2. frequency
  3. wavelength
  4. wave number
Sound wave of which of the following frequency is an ultrasonics sound?
  1. 30 Hz
  2. 300 Hz
  3. 3000 Hz
  4. 30,000 Hz
The number of oscillations completed in one second is called _________.
  1. time period
  2. velocity
  3. frequency
  4. wavelength
In which of the following, speed of the sound is maximum:
  1. air
  2. water
  3. steel
  4. kerosene
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