PHYSICS ONE LINER SET 44
1. What is Decibel? Scale of sound level2. Noise is measure in? Desible
3. The Permissible noise level at Residential area during time is 45dB
4. The range of frequency of ultrasonic wave. Greater than 20 KHz
5. Wavelength of visible spectrum is – 3900 A0 – 7600 A0
6. Supersonic air plane creates a shock wave called Sonic Boom
7. In a Filament type Light bulb most of the electric power consumed appear as Infrared rays
8. Pitch of a sound depends upon its – Frequency
9. What is the working principle of stethoscope? Reflection of Sound
10. Which instrument can be used to study the wave form of a signal? Oscilloscope
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