The power of a sound from the speaker of a radio is 20 mW. By turning the knob of the…
Physics · JEE Advanced · NTA Exams — Oscillations and Waves
The power of a sound from the speaker of a radio is 20 mW. By turning the knob of the volume control, the power of the sound is increased to 400 mW. The power increase in decibels as compared to the original power is
- 13.0 dB
- 10 dB
- 20 dB
- 8000 dB
Answer
(A) 13.0 dB
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