| ⇦ | 
| ⇨ |
If the image formed by a convex mirror of focal length 30 cm is a quarter of the size of the object, then the distance of the object from the mirror will be
Options
(a) 30 cm
(b) 60 cm
(c) 90 cm
(d) 120 cm
Correct Answer:
90 cm
Explanation:
Given, f = + 30 cm and m = 1 / 4 Magnification, m = f / (f – u)
Therefore, 30 / (30 – u) = 1 / 4
30 – u = 120
⇒ u = -90 cm
Related Questions: - Curie temperature above which
- If a magnet is suspended at an angle 30⁰ to the magnetic meridian, the dip needle
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- If the earth shrink such that its mass does not change but radius decreases to one
- A transformer is used to light a 100 W and 110 V lamp from a 220 V mains.
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- Curie temperature above which
- If a magnet is suspended at an angle 30⁰ to the magnetic meridian, the dip needle
- An electric motor runs on DC source of emf 200 V and draws a current of 10 A.
- If the earth shrink such that its mass does not change but radius decreases to one
- A transformer is used to light a 100 W and 110 V lamp from a 220 V mains.
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
18000+ students are using NEETLab to improve their score. What about you?
Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.
Share this page with your friends
Leave a Reply