Name the following :
(a) Kitchen of a cell;
(b) Power house of cell.
Complete the following sentences :
(a) An object is placed at a distance of more than 40 cm from a convex lens of focal length 20 cm. The image formed is real, inverted and ..........
(b) An object is placed at a distance 2f from a convex of lens of focal length f. The size of image formed is ............ that of the object.
(c) An object is placed at a distance 5 cm from a convex of focal length 10 cm. The image formed is virtual, upright and ............