Share Facebook Email Telegram WhatsApp Results #1. Sounds of frequencies less than 20Hz is _____ waves. Infrasonic Infrasonic Ultrasonic Ultrasonic Audible range Audible range None of these None of these #2. Unpleasant sounds are called ____. Shrill Shrill Feeble Feeble Noise Noise None of these None of these #3. The loudness of sound depends on _____. Its amplitude Its amplitude Its frequency Its frequency Its time period Its time period Its speed Its speed #4. Pitch of sound is determined by its ____. Frequency Frequency Speed Speed Amplitude Amplitude Loudness Loudness #5. Equivalent unit of Hertz is ____. m-1 m-1 s s m/s m/s s-1 s-1 #6. When the amplitude of vibration is large, sound produced is _____. No sound No sound Feeble Feeble Loud Loud None of these None of these #7. Ultrasound equipment works at frequency _____. Higher than 10,000 Hz Higher than 10,000 Hz Higher than 20,000 Hz Higher than 20,000 Hz Lower than 10,000 Hz Lower than 10,000 Hz Lower than 20,000 Hz Lower than 20,000 Hz #8. Frequency of sound is lowest for ____. Woman Woman Young boy Young boy Young girl Young girl Man Man #9. The distance between two consecutive crest or trough is called ____. Wavelength Wavelength Frequency Frequency Time period Time period Wave number Wave number #10. 1 hertz is equal to _____. 1 Vibration per minute 1 Vibration per minute 10 Vibrations per minute 10 Vibrations per minute 60 Vibrations per minute 60 Vibrations per minute 600 Vibrations per minute 600 Vibrations per minute Finish
