The magnification of a compound microscope for the final image at least distance of distinct vision is 90. The magnification of the objective lens is 15. The value of the focal length of the eyepiece will be

(1) 5 cm

(2) 6 cm

(3) $\frac{1}{6}$ cm

(4) 12 cm

In case of a compound microscope, the image formed by the objective lens is

(1) Virtual, erect and diminished

(2) Real, erect and magnified

(3) Virtual, inverted and enlarged

(4) Real, inverted and enlarged

The maximum magnification which can be obtained with the help of a simple microscope is 6. If a point object is placed at distance 3 cm from the microscope, then what was be the position of the image?

(1) -7.5 cm

(2) -6.4 cm

(3) 8.2 cm

(4) 5.45 cm

Focal lengths of objective and eyepiece of a compound microscope are 2 cm and 6.25 cm respectively. An object AB is placed at a distance of 2.5 cm from the objective which forms the image A'B' as shown in the figure. Maximum magnifying power in this case is

1.  10

2.  20

3.  5

4.  25

The correct statement is: