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Saturday, 31 October

JEE Main 2023 · PhysicsNumerical answerNumerical valueMediumMulti-step

JEE Main 10 April 2023, Shift 2, Physics Q57

Question 57 of 90 in this shift, Physics question 27 of 30, Section B.

A point object, 'O' is placed in front of two thin symmetrical coaxial convex lenses L1L_1 and L2L_2 with focal length 24 cm and 9 cm respectively. The distance between two lenses is 10 cm and the object is placed 6 cm away from lens L1L_1 as shown in the figure. The distance between the object and the image formed by the system of two lenses is _________ cm.

The figure, in words

Principal axis with point object O on the left; two coaxial convex lenses L1 and L2; O is 6 cm from L1 and the separation between L1 and L2 is 10 cm.

Official answer

34

NTA final key.

Chapter
Ray Optics and Optical Instruments
Topic
Lens Maker's Formula
Idea tested
Thin Lens Formula

Same idea in other shifts

Asked 4× in all
  1. 9 Apr 2024, Shift 1 · Q45Given below are two statements : Statement (I) : When an object is placed at the centre of curvature of a concave lens, image is formed at…MediumTwo statements
  2. 25 Jul 2022, Shift 2 · Q38For an object placed at a distance 2.4 m from a lens, a sharp focused image is observed on a screen placed at a distance 12 cm form the…HardSingle correct
  3. 31 Aug 2021, Shift 1 · Q6An object is placed at the focus of concave lens having focal length ff. What is the magnification and distance of the image from the…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. This question needs a figure we do not reproduce; it is described in words above. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.