Class V

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

HR : MIN : SEC
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