Skip to main content
Super TutorResources
Chapter 29 of 30
Practice Quiz

Doppler effect — Practice Quiz

ICSE · Class 11 · Physics

Try a 4-question quiz on Doppler effect for ICSE Class 11 Physics: tap an answer to check it and see why. 40 questions in the full chapter test.

40 questions30 flashcards10 formulas & key relations5 concepts

Interactive on Super Tutor

Studying Doppler effect? Get the full interactive chapter.

Quizzes, flashcards, AI doubt-solver and a step-by-step study plan — built for practice quiz and more.

Try Super Tutor — Free

Free trial, no card needed.

Quick Quiz: Doppler effect

0/4

Tap an answer to check it instantly. No sign-up needed for these 4.

1

A sound source emits frequency 500 Hz and moves towards a stationary observer with speed 20 m/s. Take speed of sound as 340 m/s. What is the apparent frequency heard by the observer?

2

A sound source emits 800 Hz and moves away from a stationary observer at 15 m/s. Take speed of sound as 330 m/s. What is the apparent frequency?

3

A stationary source emits 600 Hz. An observer moves towards the source at 25 m/s. Take speed of sound as 340 m/s. What is the apparent frequency heard by the observer?

4

A stationary source emits 700 Hz. An observer moves away at 20 m/s. Take speed of sound as 350 m/s. What is the apparent frequency?

40 Questions·
multiple choice

Sample Questions

1multiple choice
3 marks

A car moves towards a stationary wall at 18 m/s and blows a horn of frequency 450 Hz. Take speed of sound as 330 m/s. What frequency does the wall receive first?

Show answer

476 Hz

First treat the wall as a stationary observer. Use n1 = n(v/(v-v_c)). Here n = 450 Hz, v = 330 m/s, v_c = 18 m/s. So n1 = 450 × 330/312 = 450 × 1.057692... = 476.0 Hz.

2multiple choice
3 marks

A source and an observer move in the same direction of sound with speeds 14 m/s and 6 m/s respectively. The true frequency is 700 Hz and sound speed is 340 m/s. What is the apparent frequency?

Show answer

717 Hz

Use n' = n((v-v_o)/(v-v_s)). Here n = 700 Hz, v = 340 m/s, v_o = 6 m/s, v_s = 14 m/s. So n' = 700 × 334/326 = 700 × 1.024540... ≈ 717.2 Hz. Hence 717 Hz.

3multiple choice
3 marks

A source of 300 Hz moves away from an observer at 10 m/s, while the observer moves towards the source at 20 m/s. Take sound speed as 330 m/s. What is the apparent frequency?

Show answer

309 Hz

Because the source recedes and the observer approaches, use n' = n((v+v_o)/(v+v_s)). Here n = 300 Hz, v = 330 m/s, v_o = 20 m/s, v_s = 10 m/s. So n' = 300 × 350/340 = 308.82 Hz, which rounds to 309 Hz.

4multiple choice
3 marks

A wind of 12 m/s blows in the direction of sound. A stationary source emits 540 Hz and a stationary observer receives it. What is the apparent frequency?

Show answer

540 Hz

If both source and observer are stationary, n' = n regardless of wind. Here n = 540 Hz, so the apparent frequency remains 540 Hz.

+36 more questions on Doppler effect (ICSE Class 11 Physics)

Practise All

Frequently Asked Questions

What are the important topics in Doppler effect for ICSE Class 11 Physics?
Key topics in Doppler effect include Doppler Effect in Sound, Reflected Sound, Non-Collinear Motion, Doppler Effect in Light. Study these first, then practise questions on each for Class 11 exams.
How many practice questions are there for Doppler effect?
There are 40 questions on Doppler effect. Try the 4-question sample quiz on this page first; each answer shows an explanation when you tap it.

Sources & Official References

Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.

More resources for Doppler effect

All ICSE Class 11 Physics Practice Quiz

For serious students

Get the full Doppler effect chapter — start free.

Quizzes, flashcards, an AI doubt solver and a study plan for ICSE Class 11 Physics. Free to start, no card needed.

Try Super Tutor Free
Try this chapter free