The power of a sound from the speaker of a radio is 20 mW. By tuning the knob of the…
Physics · JEE Main · NTA Exams — Oscillations and Waves
The power of a sound from the speaker of a radio is 20 mW. By tuning the knob of the volume control, the power of the sound is increased to 400mW. The power increase in decibels as compared to the original power is
- 13 dB
- 10 dB
- 20 dB
- 800 dB
Answer
(A) 13 dB
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