Quiz  /  Mirror Formula Based MCQ

  • 1. 
    A convex mirror of focal length f forms an image which is 1/n times the object. The distance of the object from the mirror is

  • (n-1)f
  • (n-1/n) f
  • (n+1/n) f
  • (n+1) f

  • 2. 
    Consider a concave mirror of focal length 50 cm. Where should the object be placed so that its image is twice the size of the object and inverted

  • 60 cm
  • 70 cm
  • 75 cm
  • 55 cm

  • 3. 
    An object 2 cm high is placed at a distance of 16 cm from a concave mirror, which produces 3 cm high inverted image. What is the focal length of the mirror?

  • -10 cm
  • -9.6 cm
  • 9.6 cm
  • 8 cm

  • 4. 
    An erect image 3 times the size of the object is obtained with a concave mirror of radius of curvature 36 cm. What is the position of the object?

  • -12 cm
  • 5 cm
  • 10 cm
  • -21 cm

  • 5. 
    An object is placed at infinity in front of the convex mirror of radius of curvature 40 cm. How far is the image behind the mirror?

  • 20 cm
  • 25 cm
  • 30 cm
  • 35 cm

  • 6. 
    The image formed by a convex mirror of focal length 30cm is a quarter of the object. What is the distance of the object from the mirror?

  • -90 cm
  • 60 cm
  • -75 cm
  • -60 cm

  • 7. 
    Convex mirror is used to form an image of the object. Which of the following statements is wrong?

  • The image is erect
  • The image is diminished in size
  • The image is real
  • The image lies between the pole and the focus

  • 8. 
    A lens having a focal distance of 30 cm is placed in front of an object, which is located at 1m from it. Where is an image of the object located?

  • 40 cm
  • 42.85 cm
  • 52 cm
  • 60 cm

  • 9. 
    The focal length of a concave mirror is f and the distance from the object to the principle focus is x. The ratio of the size of the image to the size of the object is

  • (f + x)/f
  • f/x
  • f
  • /x
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