1.

Magnification of a compound microscope is 30. Focal length of eye-piece is 5 cm and the image is formed at a distance of distinct vision of 25 cm. The magnification of the objective lens is                                              [DPMT 2005]

A.            6    
B.            5
C.            7.5 
D.            10
Answer» C.            7.5 


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