Sound

1. The voice box is also called as

• (a) stomach
• (b) heart
• (c) larynx
• (d) mouth

2. Sound is a kind of

• (a) work
• (b) energy
• (c) force
• (d) pressure

3. The hearing range of human ear is

• (a) 20 Hz to 20,000 Hz
• (b) less than 20 Hz
• (c) more than 20,000 Hz
• (d) 20 Hz to 25,000 Hz

4. Pitch of sound is determined by its

• (a) frequency
• (b) speed
• (c) amplitude
• (d) loudness

5. The frequency of subsonic sound is

• (a) more than 20 Hz
• (b) 100 Hz
• (c) less than 20 Hz
• (d) more than 20,000 Hz

6. Cochlea is a part of

• (a) hearing organ
• (b) sound producing organ
• (c) muscular organ
• (d) air pollution

7. 1 hertz is equal to

• (a) 1 vibration per minute
• (b) 10 vibrations per minute
• (c) 60 vibrations per minute
• (d) 600 vibrations per minute

8. Sound cannot travel through

• (a) air
• (b) water
• (c) air
• (d) vacuum

9. The sound in the audible range is called

• (a) ultrasonic sound
• (b) sonic sound
• (c) subonic sound
• (d) light sound

10. Speed is

• a) Distance travelled/Time
• (b) Time/Distance travelled
• (c) Distance travelled × Time
• (d) Time + Distance travelled