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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
- Two waves are represented by the equations y₁ = a sin (?t + kx + 0.57) m
- The ratio of the acceleration for a solid sphere(mass m and radius R)rolling down
- A wire is suspended vertically from one of its ends is stretched by attaching a weight
- The value of workdone for rotating a magnet of magnetic moment M by an angle θ in external
- On a frictionless surface, a block of mass M moving at speed v collides elastically
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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