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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: - Thin uniform rod of length L, cross-sectional area A and density ρ is rotated
- A geostationary satellite is orbiting the earth at a height of 5R above that surface
- Two coherent sources of different intensities send waves which interfere.
- The volume of a nucleus is directly proportional to
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Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Thin uniform rod of length L, cross-sectional area A and density ρ is rotated
- A geostationary satellite is orbiting the earth at a height of 5R above that surface
- Two coherent sources of different intensities send waves which interfere.
- The volume of a nucleus is directly proportional to
- A cyclotron is used to accelerate
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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