Question

Ram and Shyam are friends. Ram has very good knowledge of Physics but Shyam doesn't. One day Ram placed a pencil infront of a lens and observed that enlarged image of pencil is formed on the screen. Witnessing the event Shyam asked him about the event and then Ram explained the event to him.

(i) Which of the following lens is used by Ram?
(1) Concave lens
(2) Convex lens
(3) Both concave lens and convex lens (4) Neither convex lens nor concave lens

(ii) Where is pencil placed by Ram?
(1) Between fand 2f
(2) Beyond 2f
(3) Between optical center and focus
(4) At any distance in front of lens

(iii) Nature of image formed by lens is
(1) Virtual, erect and small in size
(2) Virtual, erect and enlarge
(3) Real, inverted and enlarge
(4) Real, erect and enlarge

(iv) Which of the following optical device can form virtual image?
(1) Convex lens
(2) Concave lens
(3) Convex mirror
(4) All of these​

Answer 1

Explanation:

(i) Which of the following lens is used by Ram?

(1) Concave lens

(2) Convex lens

(3) Both concave lens and convex lens (4) Neither convex lens nor concave lens

(ii) Where is pencil placed by Ram?

(1) Between fand 2f

(2) Beyond 2f

(3) Between optical center and focus

(4) At any distance in front of lens

(iii) Nature of image formed by lens is

(1) Virtual, erect and small in size

(2) Virtual, erect and enlarge

(3) Real, inverted and enlarge

(4) Real, erect and enlarge

(iv) Which of the following optical device can form virtual image?

(1) Convex lens

(2) Concave lens

(3) Convex mirror

(4) All of these