Sound Important Questions

What does Voice Box or Larynx of human produce?

• Sound (voice)
• Electricity
• Heat
• Light

I which medium does sound propagate the most?

• Liquids
• Gases
• Vacuum
• Solids

What is Vibration?

• Vibration is the steady state of an object without movement.
• Vibration is the mechanical oscillation of an object around an equilibrium point.
• Vibration refers to the constant speed of an object in motion.
• Vibration is the process of heating an object to a high temperature.

What is the unit of frequency?

• watts (W)
• joules (J)
• hertz (Hz)
• newtons (N)

What is the maximum displacement of an oscillating object called?

• Frequency
• Wavelength
• Period
• Amplitude

What is the unit of Amplitude?

• joules (J)
• meters (m) or volts (V)
• hertz (Hz)
• decibels (dB)

What is the audible sound for Humans?

• 20 Hz to 20,000 Hz

• 5 Hz to 5000 kHz

• 30 Hz to 25,00,000 kHz

• 10 Hz to 15 kHz

A simple pendulum makes 20 oscillations in 40 seconds. What is the time period and frequency of its oscillation?

• Time Period: 3 seconds, Frequency: 0.33 Hz
• Time Period: 1 second, Frequency: 1 Hz
• Time Period: 2 seconds, Frequency: 0.5 Hz
• Time Period: 4 seconds, Frequency: 0.25 Hz

Sonali heard sound of thunderbolt 5 second after she saw flash of lightning. How far is she from the place where lightning occurs? (speed of sound = 330 m/s)

• 1650 meters
• 1000 meters
• 2000 meters
• 500 meters

What do you mean by oscillatory motion?

• Oscillatory motion is a straight-line movement without any change in direction.
• Oscillatory motion is the repetitive back-and-forth movement of an object around a central point.
• Oscillatory motion refers to the constant speed of an object in a circular path.
• Oscillatory motion is the random movement of particles in a gas.