Q 22 - Screen by a converging lens - Teachoo.jpg

Examine the above figure and state which of the following option is correct? [one small box in the figure is equal to 1 cm] 

 

(A) The mirror has a focal length of -6 cm and will produce an image of magnification +1. 

(B) he mirror has a focal length of -3 cm and will produce an image of magnification -1. 

(C) The mirror has a focal length of -3 cm and will produce an image of magnification +1. 

(D) The mirror has a focal length of -6 cm and will produce an image of magnification -1.

 

Answer - 

  • Since the mirror used here is a concave mirror focal length is negative
  • Now, each box is of 1 cm, so, 
    • Focal length = -3 cm
  • And since image formed is inverted and of the same size, so magnification will be -1

 

concave-mirror---object-at-center-of-curvature---teachoo.jpg

So, the correct answer is (b)  

 

  1. Class 10
  2. Solutions to CBSE Sample Paper - Science Class 10
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  • Solutions - CBSE Class 10 Sample Paper for 2022 Boards - Science [MCQ]

About the Author

CA Maninder Singh's photo - Founder at Teachoo
CA Maninder Singh
CA Maninder Singh is a Chartered Accountant for the past 11 years and a teacher from the past 11 years. He teaches Science, Accounts and English at Teachoo