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A convex lens produces a magnification of + 5. The object is placed:(a) at focus (b) between $f$ and $2f$(c) at less than $f$ (d) beyond $2f$
(c) At less than $f$.
Explanation
Since, the magnification of the image is positive, it means the nature of the image is virtual and erect. Also, size of the image is more than 1 which is 5, it implies that the size of the image is magnified (enlarged).
Thus, the image of this nature and size is formed when the object is placed within $f$ or less than $f$.
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