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JEE Main 2024 · PhysicsMultiple choiceSingle correctEasyCalculation

JEE Main 29 January 2024, Shift 1, Physics Q49

Question 49 of 90 in this shift, Physics question 19 of 30, Section A.

A convex mirror of radius of curvature 30 cm forms an image that is half the size of the object. The object distance is :

(1) $15$ cm
(2) $45$ cm
(3) $-15$ cmOfficial answer
(4) $-45$ cm

Official answer

Option 3

NTA final key.

Chapter: Ray Optics and Optical Instruments
Topic: Spherical Mirrors
Idea tested: Linear Magnification

Same idea in other shifts

Asked 2× in all

2 Apr 2025, Shift 2 · Q36Two identical objects are placed in front of convex mirror and concave mirror having same radii of curvature of 12 cm, at same distance of…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. Lumi analyses 42 of the 174 JEE Main shifts held from 2017 to 2026.