| ⇦ | 
| ⇨ |
A car moving with a velocity of 36 km/hr crosses a siren of frequency 500 Hz. The apparent frequency of siren after passing it will be
Options
(a) 520 Hz
(b) 485 Hz
(c) 540 Hz
(d) 460 Hz
Correct Answer:
485 Hz
Explanation:
Velocity of the car = 36000 m / 3600 s = 10 m/s
ʋemitted = 500 Hz, ʋsound = 330 m/s
ʋobs = ʋemitted [(ʋsound – ʋobs) / ʋsound]
Observed frequency ʋobs = 500 [(300 – 10) / 300]
⇒ ʋobs = 485 Hz
Related Questions: - Given a sample of radium-226 having half-life of 4 days. Find the probability,
- A satellite is revolving around the earth with a kinetic energy E. The minimum
- If the velocity of sound in air is 350 m/s, thent he fundamental frequency
- A point charge q is situated at a distance r on axis from one end of a thin
- The energy of a hydrogen atom in the ground state is – 13.6 eV. The energy of a He⁺ ion
Topics: Waves
(80)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Given a sample of radium-226 having half-life of 4 days. Find the probability,
- A satellite is revolving around the earth with a kinetic energy E. The minimum
- If the velocity of sound in air is 350 m/s, thent he fundamental frequency
- A point charge q is situated at a distance r on axis from one end of a thin
- The energy of a hydrogen atom in the ground state is – 13.6 eV. The energy of a He⁺ ion
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