1. Class 10
  2. Chapter 10 Class 10 - Light - Reflection and Refraction
  3. MCQs from NCERT Exemplar
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Question 2 - MCQs from NCERT Exemplar - Chapter 10 Class 10 - Light - Reflection and Refraction

Last updated at Dec. 16, 2024 by Teachoo

A 10 mm long all pin is placed vertically in front of a concave mirror. A 5 mm long image of the all pin is formed at 30 cm in
front of the mirror. The focal length of this mirror is
(a) – 30 cm
(c) – 40 cm
(b) – 20 cm
(d) – 60 cm


Answer


So, the correct answer is (b)

  1. Class 10
  2. Chapter 10 Class 10 - Light - Reflection and Refraction

    3. MCQs from NCERT Exemplar

    Chapter 11 Class 10 - Human Eye and Colourful World →
Chapter 11 Class 10 - Human Eye and Colourful World →
Class 10
Chapter 10 Class 10 - Light - Reflection and Refraction

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 14 years and a teacher from the past 18 years. He teaches Science, Economics, Accounting and English at Teachoo