PT-4 sound

The maximum displacement of an object from its mean position is called

• Magnitude
• Amplitude
• Intensity
• Range

The S.I unit of frequency is

• Joule (J)
• Hertz (Hz)
• Watt (W)
• Newton (N)

Back and forth motion of an object is called

• Acceleration
• Translation
• Rotation
• Oscillation or Vibration

A musical instrument which produces sound by blowing air in to it is called

• Even

• Flute

• Guitar

• None of these

Voice box is also called as

• trachea
• esophagus
• pharynx
• larynx

Sound of frequency lower than 20Hz is called

• Infrasound
• Hypersonic
• Supersonic
• Ultrasonic

Larnyx of human produces

• Digestive enzymes
• Visual stimuli
• Olfactory sensations
• Sound for speech and protection for the trachea

The velocity of sound is approximately equal to

• 500 meters per second
• 250 meters per second
• 700 meters per second
• 343 meters per second

The number of vibrations made by a vibrating body in one second is called

• frequency
• amplitude
• intensity
• wavelength

A pendulum oscillate 20times in 4 second, its time period is

• 5 seconds
• 10 seconds
• 0.5 seconds
• 0.2 seconds