| ⇦ | 
| ⇨ |
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: - Two point white dots are 1 mm apart on a black paper.
- A nucleus with mass number 220 initially at rest emits an α-particle. If the Q-value
- A solid sphere, disc and solid cylinder all of the same mass and made up of same material
- When a sound wave of wavelength λ is propagating in a medium,
- From a disc of radius R, a concentric circular portion of radius r is cut-out so
Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Two point white dots are 1 mm apart on a black paper.
- A nucleus with mass number 220 initially at rest emits an α-particle. If the Q-value
- A solid sphere, disc and solid cylinder all of the same mass and made up of same material
- When a sound wave of wavelength λ is propagating in a medium,
- From a disc of radius R, a concentric circular portion of radius r is cut-out so
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