JEE Main · Physics · Waves

General Doppler Formula

JEE Main asked General Doppler Formula 2 times in 2 of the 108 shifts Lumi analysed, all in 2021. It belongs to Doppler Effect, in Waves (Physics). In 2021 it came in more than one shift of the same year.

Updated 2026-10-24

Times asked: 2; in 2 shifts
Years: 1 of 8
First asked: 2021; the only year
Pattern: Gone quiet; across the analysed shifts

Questions on this idea a shift, by year

2017–2026. Asked in 2021. Years differ in how many shifts Lumi analysed, so each year is scaled to one shift of 25 Physics questions.

Raw count: 2017: 0 in 1 shift · 2020: 0 in 12 shifts · 2021: 2 in 24 shifts · 2022: 0 in 24 shifts · 2023: 0 in 12 shifts · 2024: 0 in 18 shifts · 2025: 0 in 8 shifts · 2026: 0 in 9 shifts.

Shift by shift

Each square is one analysed shift, in date order. Open a filled one for that paper.

20260 of 9
20250 of 8
20240 of 18
20230 of 12
20220 of 24
20212 of 24
20200 of 12
20170 of 1

Asked in that shift More than once Not asked

How JEE Main framed it

Numerical value is the usual form. Skill tested: calculation.

Source frequency from observed frequency, moving source and observer
Original frequency when source and detector recede

Difficulty

Easy 1Medium 1Hard 0

2 of the 2 questions had a numerical answer.

Every question

All 2 questions

From the official JEE Main shift papers, newest first. Open one for the full question, the options and the official answer.

Shifts: 26 Aug 2021, Shift 1, 27 Aug 2021, Shift 1.

Same topic

Other ideas in Doppler Effect

Doppler Effect has 8 ideas JEE Main has asked; 5 of them came up in more than one question.

Moving Reflector Echo3× · 2023
Moving Source Cases3× · 2023
Doppler Beat Frequency Calculation2× · 2022
Light Doppler Approximation2× · 2022
Effect of Wind Velocityonce · 2022
Moving Observer Casesonce · 2022
Exact Relativistic Doppler Formulaonce · 2017

Topic analysis Chapter analysis Study this chapter All repeated ideas