86) Which of the following lens is used as magnifying lens

A) double convex
B) double concave
C) plano-convex
D) plano-concave

87) A convex lens gives an image of the same size of the object when the object is placed

A) between the focal point and centre of curvature
B) between the focal point and the optic centre
C) beyond the centre of curvature
D) at the centre of curvature

88) Pick the correct answer from the following two statements:

A) a lens has at least one curved surface
B) a plano-concave lens has two curved surfaces

A) only A. is true
B) only B. is true
C) both A. and B. are true
D) both A. and B. are false

89) The materials suitable for making heating element of electric iron is

A) copper
B) nichrome
C) silver
D) germanium

90) Match the following:

A) (i)-C, (ii)-A, (iii)-B
B) (i)-C, (ii)-B, (iii)-A
C) (i)-A, (ii)-C, (iii)-B
D) (i)-B, (ii)-A, (iii)-C