MHT CET PYQs for doppler effect with Solutions: Practice MHT CET Previous Year Questions

Content Curator | Updated on - Oct 27, 2026

Doppler Effect is a topic from the Wave Motion chapter of Class 12 Physics, and it is part of the Physics section of the MHT CET for candidates who are preparing for the PCM (Physics, Chemistry, and Mathematics).

The key topics covered in Doppler Effect PYQs are:

Apparent frequency when the source moves
Apparent frequency when the observer moves
Source and observer both moving
Trains and whistles
Reflection of sound from a moving obstacle

Practising Doppler Effect MHT CET PYQ helps candidates to understand question pattern, improve calculation speed, and identify concepts which were asked in previous exams.

Based on chapter-wise analysis of the MHT CET Physics paper, you can get less than 1 mark per paper by covering Doppler Effect. The chapter recorded 33 questions across the 80 shifts in the data, and 16 of them came in the 2025 and 2026 papers, where it contributed about 1.0% per shift.

MHT CET Doppler Effect Chapter: Question Count, Marks and Weightage:

0.40 Average questions per shift (2018-2026)	16 Questions in the 2025 and 2026 papers (33 shifts)
33 Questions in the PDF (2017-2026)	0.8% Estimated Physics paper weightage (1.0% in 2025-2026)

The PDF holds 33 questions from MHT CET 2026 to 2017, newest first, each with its exam date and shift. Options are as printed and answer keys are not included.

Doppler Effect PYQ Statistics (2022-2026)

The table below shows the number of questions asked in MHT CET Doppler Effect PYQs. Every shift has 50 Physics questions, so the last column is the average per shift divided by 50.

Year	Total Questions (across shifts)	Shifts in the Data	Average per Shift	Weightage (out of 50 Physics Qs)
2026	4	16	0.25	0.5%
2025	12	17	0.71	1.4%
2024	9	18	0.50	1.0%
2023	5	12	0.42	0.8%
2022	0	1	0.00	0.0%

The 2018 to 2021 papers in the PDF add 2 more questions: 2021 had none, 2020 had 1, 2019 had none, 2018 had 1; the papers before 2018 add 1 from 2017.

MHT CET Doppler Effect Important Questions: Based on the Last 5 Years

The major types of questions asked from Doppler Effect in MHT CET cover the following topics:

Topic	Questions in the PDF	Questions in 2022-2026	Average per Shift (2022-2026)
Source moving towards a stationary observer	5	4	0.06
Moving observer and stationary source	10	9	0.14
Trains, whistles and passing vehicles	12	12	0.19
Source and observer both moving, or reflection from an obstacle	6	5	0.08

Pair PYQs with Other Study Material for MHT CET 2027

Click on the link to practise problems and time management skills:

Resource	Link
MHT CET Sample Paper	Check Here
MHT CET Mock Test	Check Here

Question Style in MHT CET Doppler Effect PYQs

Every question in this PDF is a single-correct MCQ. Most apply the Doppler formula once, and several repeat across years with different numbers.

Question Style	What it Tests
Apparent frequency, observer moving	The apparent frequency heard by an observer moving towards a stationary source, and the speed an observer needs for the sound to appear three times as high
Apparent frequency, source moving	A source moving towards or away from a stationary observer, and the speed at which the frequency appears to be half the original
Trains and whistles	A train whistling at 510 Hz and approaching a station at 72 km/h, and two trains, one arriving and one leaving
Pitch drop	The pitch of a whistle that appears to drop by 30% as an engine passes a stationary observer
Reflection from an obstacle	Sound reflected from an obstacle that moves towards the source, and a car driving towards a wall while sounding a siren

How to Use the Doppler Effect PYQ PDF for MHT CET

Start with the 2025 and 2026 papers first, because they hold 16 of the 33 questions.
Learn n' = n(v ± v₀)/(v ∓ vs) and decide the signs from the direction of motion before substituting.
Questions that repeat across years are common here, so solve the 2026 and 2025 sets and check how the numbers change.
Solve year-wise PYQs by timing yourself, as time management is crucial.
Re-attempt only the questions you got wrong, and note which formula or step you missed.

Video: Doppler Effect PYQs and MCQs

Source: Ritesh Dalal | Physics Edupoint

Doppler Effect PYQ for MHT CET Physics FAQs

Ques. How many questions come from Doppler Effect every year?

Ans. In this PDF, the questions are 4 from 2026, 12 from 2025, 9 from 2024, 5 from 2023 and 1 from 2020 and the rest from earlier papers. In 2025 and 2026 together the chapter had 16 questions across 33 shifts, about 0.48 per shift.

Ques. Which topics are asked most frequently in MHT CET Doppler Effect?

Ans. Trains, whistles and passing vehicles is the largest group with 12 of the 33 questions, about 36%.

Ques. What kind of questions are asked from Doppler Effect?

Ans. Single-correct MCQs on the apparent frequency heard when the source, the observer or both are moving, usually with a train or a car as the source.

Ques. What is the best way to practise Doppler Effect PYQs?

Ans. First solve the 2025 and 2026 questions completely, then the older ones, and finally re-attempt the questions you got wrong.

Ques. Can I score full marks from Doppler Effect?

Ans. In 2025 and 2026 together the chapter had 16 questions across 33 shifts. Learning the Doppler formula and its sign convention is enough to secure it. Each Physics question in MHT CET is worth 1 mark.

Ques. Does the Doppler Effect PYQ PDF include solutions?

Ans. No. The PDF contains the questions with their exam date and shift, without answer keys or solutions.

1.
When the observer moves towards a stationary source with velocity '$V_1$', the apparent frequency of the emitted note is '$F_1$'. When the observer moves away from the source with velocity '$V_1$', the apparent frequency is '$F_2$'. If 'V' is the speed of sound in air and $F_1/F_2 = 2$, then $V/V_1 =$
- $2$
- $3$
- $6$
- $8$
View Solution
2.
A person observes two moving trains. First reaching the station and another leaves the station with equal speed of $30 \text{ m/s}$. If both trains emit sounds of frequency $300 \text{ Hz}$, difference of frequencies heard by the person will be (speed of sound in air $330 \text{ m/s}$)
- $80 \text{ Hz}$
- $75 \text{ Hz}$
- $55 \text{ Hz}$
- $45 \text{ Hz}$
View Solution
3.
A vehicle starts from rest and accelerates along straight path at $ 2 \, \text{m/s}^2 $. At the starting point of the vehicle, there is a stationary electric siren. How far has the vehicle nearly gone when the driver hears the siren at 94% of its value when the vehicle was at rest? (speed of sound = 220 m/s)
- 98 m
- 49 m
- 196 m
- 24.5 m
View Solution
4.
A person observes two moving trains. First reaching the station and another leaves the station with equal speed of $30 \text{ m/s}$. If both trains emit sounds of frequency $300 \text{ Hz}$, difference of frequencies heard by the person will be (speed of sound in air $330 \text{ m/s}$)
- $80 \text{ Hz}$
- $75 \text{ Hz}$
- $55 \text{ Hz}$
- $45 \text{ Hz}$
View Solution
5.
When an observer moves towards a stationary source with velocity '$V_1$', the apparent frequency of emitted note is '$F_1$'. When observer moves away from stationary source with velocity '$V_1$' the apparent frequency is '$F_2$'. If '$v$' is velocity of sound in air and $\frac{F_1}{F_2} = 2$, then $\frac{v}{V_1}$ is equal to
- 6
- 5
- 3
- 4
View Solution
6.
A person observes two moving trains. First reaching the station and another leaves the station with equal speed of $30 \text{ m/s}$. If both trains emit sounds of frequency $300 \text{ Hz}$, difference of frequencies heard by the person will be (speed of sound in air $330 \text{ m/s}$)
- $80 \text{ Hz}$
- $75 \text{ Hz}$
- $55 \text{ Hz}$
- $45 \text{ Hz}$
View Solution
7.
At what speed should a source of sound move away from a stationary observer so that the observer finds the apparent frequency equal to half the original frequency?
- $v/2$
- $2v$
- $v/4$
- $v$
View Solution
8.
A train moving at 20 m/s approaches a stationary observer. The frequency of the whistle emitted by the train is 640 Hz. If the velocity of sound is 340 m/s, the apparent frequency heard by the observer is:
- 680 Hz
- 600 Hz
- 720 Hz
- 640 Hz
View Solution
9.
A train is moving towards a stationary observer with speed $34$ m/s. A train sounds a whistle of frequency $450$ Hz. If the speed of sound is $340$ m/s, the frequency heard by the observer in Hz is
- $440$
- $480$
- $500$
- $540$
View Solution
10.
A train moving at 20 m/s approaches a stationary observer. The frequency of the whistle emitted by the train is 640 Hz. If the velocity of sound is 340 m/s, the apparent frequency heard by the observer is:
- 680 Hz
- 600 Hz
- 720 Hz
- 640 Hz
View Solution
11.
A source of sound emits sound wave of frequency 'f' and moves towards an observer with a velocity $V/3$ where $V$ is the velocity of sound. If the observer moves away from the source with a velocity $V/5$ the apparent frequency heard by him will be ______.
- $\frac{15}{2}f$
- $\frac{8}{15}f$
- $\frac{6}{5}f$
- $\frac{15}{18}f$
View Solution
12.
A source of sound is moving towards a stationary observer with velocity '$V_S$' and then moves away with velocity '$V_S$'. Assume that medium through which the sound waves travel is at rest. If 'V' is the velocity of sound and 'n' is the frequency emitted by the source then the difference between the apparent frequencies heard by the observer is
- $\frac{2nVV_s}{V^2-V_s^2}$
- $\frac{nVV_s}{V^2-V_s^2}$
- $\frac{nVV_s}{V_s^2+V^2}$
- $\frac{2nVV_s}{V_s^2+V^2}$
View Solution
13.
When observer moves toward stationary source with $v_1$, apparent frequency is $F_1$. When moving away with $v_1$, it is $F_2$. If $F_1/F_2 = 2$, find $V/v_1$.
- 3
- 2
- 1
- 4
View Solution
14.
A person observes two moving trains. 'A' reaching the station and 'B' leaving the station with equal speed of 30m/s. If both trains emit sounds with frequency 300 Hz, (speed of sound = 330 m/s) difference of frequencies heard by the person will be
- $10 \text{Hz}$
- $33 \text{Hz}$
- $55 \text{Hz}$
- $80 \text{Hz}$
View Solution
15.
Calculate the percentage increase in apparent frequency for an observer moving towards a stationary sound source with $ \frac{1}{5} $th the velocity of sound.
- $10%$
- $20%$
- $25%$
- $30%$
View Solution

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MHT CET PYQs for doppler effect with Solutions: Practice MHT CET Previous Year Questions

Doppler Effect PYQ Statistics (2022-2026)

MHT CET Doppler Effect Important Questions: Based on the Last 5 Years

Pair PYQs with Other Study Material for MHT CET 2027

Question Style in MHT CET Doppler Effect PYQs

How to Use the Doppler Effect PYQ PDF for MHT CET

Video: Doppler Effect PYQs and MCQs

Doppler Effect PYQ for MHT CET Physics FAQs

2.
A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \text{ m/s}\). If both trains emit sounds of frequency \(300 \text{ Hz}\), difference of frequencies heard by the person will be (speed of sound in air \(330 \text{ m/s}\))

4.
A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \text{ m/s}\). If both trains emit sounds of frequency \(300 \text{ Hz}\), difference of frequencies heard by the person will be (speed of sound in air \(330 \text{ m/s}\))

6.
A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \text{ m/s}\). If both trains emit sounds of frequency \(300 \text{ Hz}\), difference of frequencies heard by the person will be (speed of sound in air \(330 \text{ m/s}\))

7.
At what speed should a source of sound move away from a stationary observer so that the observer finds the apparent frequency equal to half the original frequency?

8.
A train moving at 20 m/s approaches a stationary observer. The frequency of the whistle emitted by the train is 640 Hz. If the velocity of sound is 340 m/s, the apparent frequency heard by the observer is:

9.
A train is moving towards a stationary observer with speed \(34\) m/s. A train sounds a whistle of frequency \(450\) Hz. If the speed of sound is \(340\) m/s, the frequency heard by the observer in Hz is

10.
A train moving at 20 m/s approaches a stationary observer. The frequency of the whistle emitted by the train is 640 Hz. If the velocity of sound is 340 m/s, the apparent frequency heard by the observer is:

11.
A source of sound emits sound wave of frequency 'f' and moves towards an observer with a velocity $V/3$ where $V$ is the velocity of sound. If the observer moves away from the source with a velocity $V/5$ the apparent frequency heard by him will be ______.

13.
When observer moves toward stationary source with $v_1$, apparent frequency is $F_1$. When moving away with $v_1$, it is $F_2$. If $F_1/F_2 = 2$, find $V/v_1$.

14.
A person observes two moving trains. 'A' reaching the station and 'B' leaving the station with equal speed of 30m/s. If both trains emit sounds with frequency 300 Hz, (speed of sound = 330 m/s) difference of frequencies heard by the person will be

15.
Calculate the percentage increase in apparent frequency for an observer moving towards a stationary sound source with \( \frac{1}{5} \)th the velocity of sound.

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Doppler Effect PYQ Statistics (2022-2026)

MHT CET Doppler Effect Important Questions: Based on the Last 5 Years

Pair PYQs with Other Study Material for MHT CET 2027

Question Style in MHT CET Doppler Effect PYQs

How to Use the Doppler Effect PYQ PDF for MHT CET

Video: Doppler Effect PYQs and MCQs

Doppler Effect PYQ for MHT CET Physics FAQs

2.A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \text{ m/s}\). If both trains emit sounds of frequency \(300 \text{ Hz}\), difference of frequencies heard by the person will be (speed of sound in air \(330 \text{ m/s}\))

4.A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \text{ m/s}\). If both trains emit sounds of frequency \(300 \text{ Hz}\), difference of frequencies heard by the person will be (speed of sound in air \(330 \text{ m/s}\))

6.A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \text{ m/s}\). If both trains emit sounds of frequency \(300 \text{ Hz}\), difference of frequencies heard by the person will be (speed of sound in air \(330 \text{ m/s}\))

7.At what speed should a source of sound move away from a stationary observer so that the observer finds the apparent frequency equal to half the original frequency?

8.A train moving at 20 m/s approaches a stationary observer. The frequency of the whistle emitted by the train is 640 Hz. If the velocity of sound is 340 m/s, the apparent frequency heard by the observer is:

9.A train is moving towards a stationary observer with speed \(34\) m/s. A train sounds a whistle of frequency \(450\) Hz. If the speed of sound is \(340\) m/s, the frequency heard by the observer in Hz is

10.A train moving at 20 m/s approaches a stationary observer. The frequency of the whistle emitted by the train is 640 Hz. If the velocity of sound is 340 m/s, the apparent frequency heard by the observer is:

11.A source of sound emits sound wave of frequency 'f' and moves towards an observer with a velocity $V/3$ where $V$ is the velocity of sound. If the observer moves away from the source with a velocity $V/5$ the apparent frequency heard by him will be ______.

13.When observer moves toward stationary source with $v_1$, apparent frequency is $F_1$. When moving away with $v_1$, it is $F_2$. If $F_1/F_2 = 2$, find $V/v_1$.

14.A person observes two moving trains. 'A' reaching the station and 'B' leaving the station with equal speed of 30m/s. If both trains emit sounds with frequency 300 Hz, (speed of sound = 330 m/s) difference of frequencies heard by the person will be

15.Calculate the percentage increase in apparent frequency for an observer moving towards a stationary sound source with \( \frac{1}{5} \)th the velocity of sound.

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2.
A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \text{ m/s}\). If both trains emit sounds of frequency \(300 \text{ Hz}\), difference of frequencies heard by the person will be (speed of sound in air \(330 \text{ m/s}\))

4.
A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \text{ m/s}\). If both trains emit sounds of frequency \(300 \text{ Hz}\), difference of frequencies heard by the person will be (speed of sound in air \(330 \text{ m/s}\))

6.
A person observes two moving trains. First reaching the station and another leaves the station with equal speed of \(30 \text{ m/s}\). If both trains emit sounds of frequency \(300 \text{ Hz}\), difference of frequencies heard by the person will be (speed of sound in air \(330 \text{ m/s}\))

7.
At what speed should a source of sound move away from a stationary observer so that the observer finds the apparent frequency equal to half the original frequency?

8.
A train moving at 20 m/s approaches a stationary observer. The frequency of the whistle emitted by the train is 640 Hz. If the velocity of sound is 340 m/s, the apparent frequency heard by the observer is:

9.
A train is moving towards a stationary observer with speed \(34\) m/s. A train sounds a whistle of frequency \(450\) Hz. If the speed of sound is \(340\) m/s, the frequency heard by the observer in Hz is

10.
A train moving at 20 m/s approaches a stationary observer. The frequency of the whistle emitted by the train is 640 Hz. If the velocity of sound is 340 m/s, the apparent frequency heard by the observer is:

11.
A source of sound emits sound wave of frequency 'f' and moves towards an observer with a velocity $V/3$ where $V$ is the velocity of sound. If the observer moves away from the source with a velocity $V/5$ the apparent frequency heard by him will be ______.

13.
When observer moves toward stationary source with $v_1$, apparent frequency is $F_1$. When moving away with $v_1$, it is $F_2$. If $F_1/F_2 = 2$, find $V/v_1$.

14.
A person observes two moving trains. 'A' reaching the station and 'B' leaving the station with equal speed of 30m/s. If both trains emit sounds with frequency 300 Hz, (speed of sound = 330 m/s) difference of frequencies heard by the person will be

15.
Calculate the percentage increase in apparent frequency for an observer moving towards a stationary sound source with \( \frac{1}{5} \)th the velocity of sound.