Class V

Sound travels in form of
  1. Waves
  2. Particle
  3. Magnetic
  4. All of these
Number of vibration produced in one second is called
  1. Amplitude
  2. Wavelength
  3. Frequency
  4. Time- period
Light is a form of
  1. Power
  2. Length
  3. Energy
  4. Mass
In human beings, sound is produced in
  1. Ear
  2. Brain
  3. Tongue
  4. Vocal cord
Which one is a transparent object ?
  1. Stone
  2. Dense fog
  3. Wax paper
  4. Reading glass
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