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Sound waves travel at 350m/s through a warm air and at 3500 m/s through brass. The wavelength of a 700 Hz acoustic wave as it enters brass from warm air
Options
(a) decreases by a factor 10
(b) increases by a factor 20
(c) decreases by a factor 20
(d) increases by a factor 10
Correct Answer:
decreases by a factor 20
Explanation:
We have, v = nλ ⇒ v ∞ λ (as n remains constant)
Thus, as v increases 10 times, λ also increases 10 times.
Related Questions: - An Electric charge does not have which of the following properties?
- A mass m moves in a circle on a smooth horizontal plane with velocity v₀
- For a parallel beam of monochromatic light of wavelength λ diffraction is produced
- A body cools in 7 minute from 60⁰C to 40⁰C. What time, in minute does it take to cool
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- An Electric charge does not have which of the following properties?
- A mass m moves in a circle on a smooth horizontal plane with velocity v₀
- For a parallel beam of monochromatic light of wavelength λ diffraction is produced
- A body cools in 7 minute from 60⁰C to 40⁰C. What time, in minute does it take to cool
- A plane wave of wavelength 6250Å is incident normally on a slit of width 2×10⁻² cm.
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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