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Physics 10 Chapter 3 - Geometrical Optics - 7
1.
When real object will be formed?
a) When image distance is negative
b) When image distance is positive
c) When object distance is negative
d) When object distance is positive
2.
For concave mirrors, which of the following is true?
a) Focal length is negative
b) Image distance is negative
c) Object distance is negative
d) Object distance is positive
3.
When virtual object will be formed?
a) When object distance is negative
b) When object distance is positive
c) When image distance is negative
d) When image distance is positive
4.
For concave mirrors, which of the following is true?
a) Image distance is negative
b) Focal length is negative
c) Object distance is negative
d) None of these
5.
When real image will be formed?
a) When object distance is negative
b) When object distance is positive
c) When image distance is positive
d) When image distance is negative
6.
For concave mirrors, which of the following is true?
a) Image distance is negative
b) Focal length is negative
c) Object distance is negative
d) Image distance is positive
7.
When virtual image will be formed?
a) When object distance is negative
b) When image distance is negative
c) When object distance is positive
d) When image distance is positive
8.
An object is placed at the centre of curvature of a concave mirror. The image produced by the mirror is located............?
a) At the focal point
b) Between the centre of curvature and the focal point
c) At the centre of curvature
d) Out beyond the centre of curvature
9.
For concave mirrors, which of the following is true?
a) Image distance is negative
b) None of these
c) Object distance is negative
d) Focal length is positive
10.
For concave mirrors, which of the following is true?
a) Image distance is positive
b) Focal length is positive
c) All of these
d) Object distance is positive
11.
For convex mirrors, which of the following is true?
a) Focal length is negative
b) Object distance is positive
c) None of these
d) Image distance is positive
12.
For convex mirrors, which of the following is true?
a) Image distance is positive
b) Focal length is positive
c) None of these
d) Object distance is positive
13.
For convex mirrors, which of the following is true?
a) Object distance is negative
b) All of these
c) Focal length is negative
d) Image distance is negative
14.
Which mirrors produce images that are smaller than the objects?
a) Converging mirrors
b) Convex mirrors
c) Parabolic mirrors
d) Concave mirrors
15.
A converging mirror with a radius of 20 cm creates a real image 30 cm from the mirror. What is the object distance?
a) 7.5 cm
b) 15 cm
c) 20 cm
d) 5.0cm
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