| ⇦ | 
| ⇨ |
A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of
Options
(a) 100
(b) 1000
(c) 10000
(d) 10
Correct Answer:
100
Explanation:
L₁ = 10 log (I₁ / I₀) ; L₂ = 10 log (I₂ / I₀)
L₁ – L₂ = 10 log (I₁ / I₀) – 10 log (I₂ / I₀)
Δ L = 10 log (I₁ / I₂)
20 dB = 10 log (I₁ / I₂)
10 ² = (I₁ / I₂)
I₂ = I₁ / 100.
Related Questions: - An ideal gas is compressed to half its initial volume by means of several processes.
- A beam of cathode rays is subjected to crossed Electric (E) and Magnetic fields (B)
- The radii of circular orbits of two satellites A and B of the earth, are 4R and R
- A particle is kept at rest at the top of a sphere of diameter 42m.When disturbed slightly
- In producing chlorine through electrolysis 100 watt power at 1125 V is being
Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An ideal gas is compressed to half its initial volume by means of several processes.
- A beam of cathode rays is subjected to crossed Electric (E) and Magnetic fields (B)
- The radii of circular orbits of two satellites A and B of the earth, are 4R and R
- A particle is kept at rest at the top of a sphere of diameter 42m.When disturbed slightly
- In producing chlorine through electrolysis 100 watt power at 1125 V is being
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply