For the object placed between the optical centre and focus of a convex lens, the image is :

1. real and enlarged
2. real and diminished
3. virtual and enlarged
4. virtual and diminished

A concave lens forms the image of an object which is:

1. virtual, inverted, and diminished
2. virtual, upright, and diminished
3. virtual, inverted, and enlarged
4. virtual, upright, and enlarged.

A concave lens is used in :

1. in slide projector
2. as magnifying glass
3. as burning glass
4. in Galilean telescope

For a concave lens, when the object is at a distance equal to the focal length of the lens, the image is formed at :

1. optical centre
2. second focus
3. first focus
4. mid point between the optical centre and second focus of the lens