Where should an object be placed in front of a convex lens so as to obtain its virtual, erect and magnified image?
To obtain a virtual, erect, and magnified image of an object, it should be placed within the focus $F'$, i.e., between the optical centre $(C)$ and the focus $(F')$ of a convex lens.
Explanation
When an object is placed at a distance less than the focus i.e., between the optical centre $C$ and focus, $F'$ of a convex lens, then the image formed is virtual, erect, enlarged, and on the same side as the object.
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