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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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Topics: Ray Optics
(94)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- A car of mass 1000 kg negotiates a banked curve of radius 90 m on a frictionless
- Two masses of 9 g and 6 g are connected with a string which is passing over a frictionless
- The self-inductance of a choke coil is 10 mH. When it is connected with a 10 V DC source,
- A liquid boils when its vapour pressure equals
- Nickel shows ferromagnetic property at room temperature. If the temperature is
Topics: Ray Optics (94)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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