Q14.A small speaker delivers 2 W of audio output. At what distance from the speaker will one detect 120 dB intensity sound? [Given reference intensity of sound as 10−12 W/m2 ] (1) 40 cm (2) 20 cm (3) 10 cm (4) 30 cm
What This Question Tests
This question involves calculating the total number of molecules by integrating the given number density over all space, requiring knowledge of spherical coordinates and Gaussian integrals.
Concepts Tested
Formulas Used
dN = n(r) dV
dV = 4πr²dr
∫x^a e^(-bx^c) dx
📚 NCERT Sections This Tests
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10.5 In Young’s double-slit experiment using monochromatic light of wavelength l, the intensity of light at a point on the screen where path difference is l, is K units. What is the intensity of light at a point where path difference is l/3?
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📋 Question Details
- Chapter
- Thermodynamics & KTG
- Topic
- Kinetic theory of gases
- Year
- 2019
- Shift
- 12 Apr Shift 2
- Q Number
- Q14
- Type
- MCQ
- NCERT Ref
- Class 11 Physics Ch 13: Kinetic Theory
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