JEE Main · Physics · Ray Optics and Optical Instruments

Displacement Method

JEE Main asked Displacement Method once in the 108 shifts Lumi analysed, on 4 Sep 2020, Shift 2. It belongs to Lens Maker's Formula, in Ray Optics and Optical Instruments (Physics).

Updated 2026-10-24

Times asked: 1; in 1 shift
Years: 1 of 8
First asked: 2020; the only year
Pattern: Gone quiet; asked once so far

Questions on this idea a shift, by year

2017–2026. Asked in 2020. 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: 1 in 12 shifts · 2021: 0 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
20210 of 24
20201 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.

Lens power from displacement method

Difficulty

Easy 0Medium 1Hard 0

1 of the 1 question had a numerical answer.

Every question

The question

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

4 Sep 2020, Shift 2 · Q24The distance between an object and a screen is 100 cm. A lens can produce real image of the object on the screen for two different…MediumNumerical value

Shift: 4 Sep 2020, Shift 2.

Same topic

Other ideas in Lens Maker's Formula

Lens Maker's Formula has 16 ideas JEE Main has asked; 9 of them came up in more than one question. The 12 most asked are below.

Topic analysis Chapter analysis Study this chapter All repeated ideas