# ICSE Worksheet for chapter-14 Spherical Mirrors class 9

## Find ICSE Worksheet for chapter-14 Spherical Mirrors class 9

CLASS-9

BOARD: ICSE

Physics Worksheet - 14

TOPIC: Spherical Mirrors

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SUMMARY

• Introduction, Terms Related to Spherical Mirrors
• Reflection From a Spherical Mirror
• Focus, Focal Length and Radius of Curvature
• Ray Diagram For Formation of Images in A Concave & Convex Mirror
• Uses Of Spherical Mirrors
• Distinction Between Plane , Concave And Convex Mirrors

#### SECTION 1 – OBJECTIVE

1. Name the mirror which always produces an erect and virtual image.
1. Plain mirror
2. Concave mirror
3. Convex mirror
4. All of these
2. The radius of curvature of a concave mirror is 10 cm. Its focal length is
1. 10 cm
2. 5 cm
3. 20 cm
4. 15 cm
3. A ray of light is directed towards the centre of curvature on a spherical mirror. The reflected ray will
1. Passes through focus
2. Passes through pole
3. Passes through centre of curvature
4. Become parallel to principal axis.
4. The image formed by a convex mirror is:
1. Erect and diminished
2. Erect and enlarged
3. Inverted and diminished
4. Inverted and enlarged
5. For an object kept at a distance 36 cm from a concave mirror of focal length 12 cm, The image is:
1. Real, inverted, diminished
2. Real, erect, diminished
3. Virtual, inverted, diminished
4. Virtual, erect, magnified
6. An object is kept in front of a convex mirror of focal length 10 cm, at a distance 20 cm. The image is formed at:
1. 20 cm on the side of object
2. Beyond 20 cm on the side of object
3. Between 0 and 10cm on the side of object
4. Between 0 and 10 cm on the side opposite to object
7. For an object kept at a distance 36 cm from a concave mirror of focal length 12 cm, the image is :
1. Real, inverted, diminished
2. Real, erect, diminished
3. Virtual, inverted, magnified
4. Virtual, erect, magnified.
8. The mirror used for shaving is preferably:
1. Concave
2. Plane
3. Convex
4. Parabolic
9. The mirror used as rear view mirror in automobiles is:
1. (A) Concave
2. (B) Plane
3. (C) Convex
4. (D) Parabolic
10. The focal length of concave mirror is 10 cm. Find its radius of curvature.
1. 10 cm
2. 30 cm
3. 20 cm
4. 55 cm

#### SECTION 2 - SUBJECTIVE

1. Define the following terms with reference to a spherical mirror:
1. Pole
2. Principal axis
3. Centre of curvature
2. Discuss the position and nature of the image formed by a concave mirror when the object is moved from infinity towards the pole of the mirror.
3. Give the uses of plane mirror, concave mirror and convex mirror.
4. Why does a driver use a convex mirror as a rear view mirror?