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WBJEE 2013 Physics Solved Paper

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Question : 24

Total: 60

An object placed at a distance of 16 cm from a convex lens produces an image of magnification m (m > 1). If theobject is moved towards the lens by 8 cm then again an image of magnification m is obtained. The numerical value ofthe focal length of the lens is

12 cm
14 cm
18 cm
20 cm

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