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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.
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Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A double slit experiment is performed with light of wavelength 500 nm. A thin film
- ln a surrounding medium of temperature 10⁰C a body takes 7 min for a fall
- For a satellite moving in an orbit around the earth, the ratio of kinetic
- A ball is projected upwards from the foot of a tower. The ball crosses the top
- A current of 5 A is flowing at 220 V in the primary coil of a transformer. If the voltage
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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