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Science

10th

grade

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CBSE CLASS 10 SCIENCE CHAPTER LIGHT

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20 questions

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  • 1. Multiple Choice
    1 minute
    1 pt

    Which of the following can make a parallel beam of light when light from a point source is incident on it ?

    Concave mirror as well as convex lens

    Convex mirror as well as concave lens

    Two plane mirrors placed at 90° to each other

    Concave mirror as well as concave lens

  • 2. Multiple Choice
    1 minute
    1 pt

    A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is

    -30 cm

    -20 cm

    -40 cm

    -60 cm

  • 3. Multiple Choice
    1 minute
    1 pt

    Under which of the following conditions a concave mirror can form an image larger than the actual object ?

    When the object is kept at a distance equal to its radius of curvature

    When object is kept at a distance less than its focal length

    When object is placed between the focus and centre of curvature

    When object is kept at a distance greater than its radius of curvature

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