10th Class Science Sample Paper Science Olympiad Model Test Paper-17

  • question_answer
    Focal length of a lens is 50 cm, calculate its power.

    A) \[+\,\,2D\]

    B) \[-\,\,2D\]

    C) \[+\,\,1D\]

    D) \[-\,\,1\,D\]

    E) None of these

    Correct Answer: A


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