a converging lens

Where will you keep an object in front of a convex lens in order to get a virtual and magnified image?

Which of the following lenses would you prefer to use while reading very small letters?

Observe the following figure and complete the table.

An object $\mathrm{AB}$ is placed between $\mathrm{O}$ and ${\mathrm{F}}_1$ on the principal axis of a converging lens as shown in the diagram.

Copy the diagram and by using three standard rays starting from point $\mathrm{A}$, obtain an image of the object $\mathrm{AB}$.

If the object is placed at a principal focus $\mathrm{F}_{1}$ of a convex lens, draw the ray diagram for the image formation.

A virtual, diminished image is formed when an object is placed between the optical centre and the principal focus of a lens.
(i) Name the type of lens which forms the above image.
(ii) Draw a ray diagram to show the formation of the image with the above stated characteristics.  

The diagram shows an object '$O$', and its image '$I$' formed by a lens. In the diagram, draw the lens and the rays to show how the image is formed. Mark focus $F$, of the lens. Name the lens.

Observe the given incomplete diagram.

Complete the diagram by drawing refracted rays and show the image formed.