| ⇦ | 
| ⇨ |
When the wavelength of sound changes from 1 m to 1.01 m, the number of beats heard are 4. The velocity of sound is
Options
(a) 400 m/s
(b) 300 m/s
(c) 404 m/s
(d) 100 m/s
Correct Answer:
404 m/s
Explanation:
v = ʋλ ⇒ Now, v = ʋ × 1
v = 1.01 × ʋ’ Also ʋ’ = (ʋ – 4)
So, ʋ × 1 = 1.01 × (ʋ – 4)
⇒ 1.01ʋ – ʋ = 1.01 × 4
0.01ʋ = 1.01 × 4
⇒ ʋ = 404 Hz
v = ʋλ
= 404 × 1 = 404 m/s
Related Questions: - According to Hook’s law of elasticity, if stress is increased, the ratio of stress
- The magnetic field in a certain region of space is given by B =8.35×10⁻² Î T.
- In an astronomical telescope in normal adjustment a straight black line of length
- A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0 MeV
Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- According to Hook’s law of elasticity, if stress is increased, the ratio of stress
- The magnetic field in a certain region of space is given by B =8.35×10⁻² Î T.
- In an astronomical telescope in normal adjustment a straight black line of length
- A straight conductor of length 0.4 m is moved with a speed of 7 ms⁻¹perpendicular
- The binding energy per nucleon in deuterium and helium nuclei are 1.1 MeV and 7.0 MeV
Topics: Waves (80)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply