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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 bullet loses 1/20 of its velocity after penetrating a plank.How many planks
- Two particles of masses m₁ m₂ move with initial velocities u₁ and u₂
- A coil of 40 henry inductance is connected in series with a resistance of 8 ohm
- When a ball is thrown up vertically with velocity vₒ,it reaches a maximum height
- A particle moves in a circle of radius 5 cm with constant speed and time period
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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