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objective Ques (30 results)
1)

An object is placed at a distance of 0.25 m in front of a plane mirror. The distance between the object and image will be
 

Class 10 Physics
A)

0.25 m
 

B)

1.0 m
 

C)

0.5 m
 

D)

0.125 m

2)

The angle of incidence for a ray of light having zero reflection angle is

Class 10 Physics
A)

0

B)

30°

C)

45°

D)

90°

3)

For a real object, which of the following can produce a real image?

Class 10 Physics
A)

Plane mirror

B)

Convex mirror

C)

Concave mirror

D)

Concave lens

4)

Which of the following mirror is used by a dentist to examine a small cavity?

Class 10 Physics
A)

 Convex mirror

B)

Plane mirror

C)

Concave mirror

D)

Combination of convex and concave mirror

5)

An object at a distance of 30 cm from a concave mirror gets its image at the same point. The focal length of the mirror is

Class 10 Physics
A)

– 30 cm

B)

30 cm

C)

– 15 cm

D)

15 cm

6)

An object at a distance of + 15 cm is slowly moved towards the pole of a convex mirror. The image will get

Class 10 Physics
A)

shortened and real

B)

enlarged and real

C)

enlarge and virtual

D)

diminished and virtual

7)

A concave mirror of radius 30 cm is placed in water. It’s focal length in air and water differ by

Class 10 Physics
A)

15

B)

20

C)

30

D)

0

E)

10

8)

The image formed by concave mirror is real, inverted and of the same size as that of the object. The position of object should be

Class 10 Physics
A)

at the focus

B)

at the centre of curvature

C)

beyond centre of curvature

D)

between focus and centre of curvature
 

9)

The nature of the image formed by concave mirror when the object is placed between the focus (F) and centre of curvature (C) of the mirror observed by us is

Class 10 Physics
A)

real, inverted and enlarged

B)

real, inverted and diminished

C)

virtual, erect and smaller in size

D)

virtual, upright and enlarged

10)

The nature of image formed by a convex mirror when the object distance from the mirror is less than the distance between pole and focal point (F) of the mirror would be

Class 10 Physics
A)

real, inverted and diminished in size

B)

virtual, upright and diminished in size

C)

real, inverted and enlarged in size

D)

virtual, upright and enlarged in size

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