Question

9) Under which of the following conditions a concave mirror can form an image
larger than the actual object?
(a) When the object is kept at a distance equal to its radius of curvature
(b) When object is kept at a distance less than its focal length
(c) When object is placed between the focus and centre of curvature
(d) When object is kept at a distance greater than its radius of curvature
10) Which of the following statements is true?
(a) A convex lens has 4 dioptre power having a focal length 0.25 m
(b) A convex lens has -4 dioptre power having a focal length 0.25 m
(C) A concave lens has 4 dioptre power having a focal length 0.25 m
(d) A concave lens has -4 dioptre power having a focal length 0.25 m.
11) Magnification produced by a rear view mirror fitted in vehicles
(a) is less than one (b) is more than one (c) is equal to one
(d) can be more than or less than one depending upon the position of the object
in front of it.
12) Rays from Sun converge at a point 15 cm in front of a concave mirror. Where an
object should be placed so that size of its image is equal to the size of the
object?
(a) 15 cm in front of the mirror (b) 30 cm in front of the mirror
(C) between 15 cm and 30 cm in front of the mirror
(d) more than 30 cm in front of the mirror.
13) A full length of a distant tall building can definitely be seen by using.
(a) a concave mirror (b) a convex mirror (c) a plane mirror
(d) both concave as well as plane mirror
14) In torches search lights and headlights of vehicles the bulb is placed
(a) between the pole and the focus of the reflector
(b) very near to the focus of the reflector
(c) between the focus and centre of curvature of the reflector
(d) at the centre of curvature of the reflector.
15) The laws of reflection hold good for
(a) plane mirror only (b) concave mirror only (c) convex mirror only
(d) all mirrors irrespective of their shape
16) You are given water, mustard oil, glycerine and kerosene. In which of these media
a ray light incident obliquely at same angle would bend the most?
(a) Kerosene (b) Water (c) Mustard oil (d) Glycerine
-
a manie mirror. She finds the image of her head​

Answer 1

Explanation:

I know but you are kanjus Das sawal sirf 5 points ka