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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
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- In a P-N junction
- Which of the following is an example of ideal black body?
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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A man goes 10 m towards north, then 20m towards east, the displacement is
- In a P-N junction
- Which of the following is an example of ideal black body?
- A galvanometer of resistance 50Ω is connected to a battery of 3 V along with a resistance
- A n-p-n transistor is connected in common emitter configuration in a given amplifier.
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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