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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
- If A=3i+4j and B=7i+24j the vector having the same magnitude as B and parallel to A is
- The displacement of a particle along the x-axis is given by x = a sin² ?t
- The distance travelled by a particle starting from rest and moving
- A slab consists of two parallel layers of two different materials of same thickness
- A force of 5 N is acting on an object. Displacement of object is 10 m and the work done
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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