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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: - When the disc rotates with uniform angulr velocity.Which of the following is not true?
- A tuned amplifier circuit is used to generate a carrier frequency of 2 MHz
- In a transistor the collector current is always less than the emitter current
- Lumen is the unit of
- Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively
Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- When the disc rotates with uniform angulr velocity.Which of the following is not true?
- A tuned amplifier circuit is used to generate a carrier frequency of 2 MHz
- In a transistor the collector current is always less than the emitter current
- Lumen is the unit of
- Two tangent galvanometers A and B have coils of radii 8 cm and 16 cm respectively
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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