The focal lengths of the objective and eyepiece of a compound microscope are \(2\text{cm}\) and \(6.25\text{cm}\) respectively. An object \(AB\) is placed at a distance of \(2.5\text{cm}\) from the objective which forms the image \(A'B'\) as shown in the figure. The maximum magnifying power in this case, will be:

| 1. | \(10\) | 2. | \(20\) |
| 3. | \(5\) | 4. | \(25\) |
If the focal length of the objective lens is increased, then magnifying power of:
| 1. | microscope will increase but that of telescope decrease |
| 2. | microscope and telescope both will increase |
| 3. | microscope and telescope both will decrease |
| 4. | microscope will decrease but that of the telescope will increase |