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Saturday, 31 October

JEE Main 2021 · PhysicsMultiple choiceSingle correctMediumApplication

JEE Main 26 February 2021, Shift 1, Physics Q16

Question 16 of 90 in this shift, Physics question 16 of 30, Section A.

A short straight object of height 100 cm lies before the central axis of a spherical mirror whose focal length has absolute value ∣f∣=40|f|=40 cm. The image of object produced by the mirror is of height 25 cm and has the same orientation of the object. One may conclude from the information :
  1. (1)Image is virtual, opposite side of concave mirror.
  2. (2)Image is real, same side of concave mirror.
  3. (3)Image is virtual, opposite side of convex mirror.Official answer
  4. (4)Image is real, same side of convex mirror.

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 3× in all
  1. 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
  2. 29 Jan 2024, Shift 1 · Q49A convex mirror of radius of curvature 30 cm forms an image that is half the size of the object. The object distance is :EasySingle 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 108 of the 174 JEE Main shifts held from 2017 to 2026.