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  3. JEE Main & Advanced

JEE Main & Advanced Sample Paper JEE Main Sample Paper-39

  • question_answer
    Consider the following u-v diagram regarding the experiment to determine the focal length of a convex lens. At the point A, the values of u and v are equal. The focal length of the lens is

    A)  40 cm                        

    B)  20 cm

    C)  10 cm                        

    D)  15 cm

    Correct Answer: B

    Solution :

     Clearly the co-ordinates of A are (2f, 2f) \[\therefore \] \[f=\frac{40}{2}=20cm.\]


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