Igcse Model Questions Vol1 2025 Physics Question 34
Practice objective / multiple choice question 34 from the 2025 Igcse Model Questions Vol1 Physics examination.
A police car equipped with a siren of frequency \(800\,\text{Hz}\) approaches a stationary observer at \(30\,\text{m s}^{-1}\). The speed of sound in air is \(340\,\text{m s}^{-1}\). At the same time, a stationary ambulance nearby also emits a siren of the same nominal frequency \(800\,\text{Hz}\). (a) What frequency does the observer hear from the approaching police car? (b) What beat frequency does the observer perceive between the two sirens? (c) After the police car passes the observer and continues away at the same speed, what frequency does the observer hear from the police siren then?
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About This Question
This is Igcse Model Questions Vol1 2025 Physics Question 34. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Physics examination.
Difficulty level: Medium .
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