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प्रश्न
A convex lens has a focal length of 10 cm. At which of the following positions should an object be placed so that this convex lens may act as a magnifying glass?
विकल्प
15 cm
7 cm
20 cm
25 cm
MCQ
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उत्तर
7 cm
Explanation:
Since the image of an object placed between the focus and the optical centre of a convex lens is enlarged and virtual.
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