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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 the image formed by a convex mirror of focal length 30 cm is a quarter of the size
- What is the Q-value of the reaction? ¹H+⁷Li→⁴He+⁴He
- If white light is used in Young’s double slit experiment
- If the value of potential in an A.C circuit is 10 V, the peak value of potential is
- An electric dipole of dipole moment p is aligned parallel to a uniform electric field E
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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