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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.
Related Questions: - The dimensions of pressure are equal to those of
- what is the electric potential at a distance of 9cm from 3nC?
- We get Balmer series when electron comes from
- Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54Å.
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Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- The dimensions of pressure are equal to those of
- what is the electric potential at a distance of 9cm from 3nC?
- We get Balmer series when electron comes from
- Copper has face centered cubic (fcc) lattice with interatomic spacing equal to 2.54Å.
- 24 cells of emf 1.5 V each having internal resistance of 1 ohm are connected
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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