MCQ Class 10 Mathematics Introduction to Trigonometry Trigonometric Tables

1. There will be total 30 MCQ in this test.
2. Please keep a pen and paper ready for rough work but keep your books away.
3. The test will consist of only objective type multiple choice questions requiring students to mouse-click their correct choice of the options against the related question number.
4. No negative marking for incorrect choice.
5. Please click on “Finish the Test” when you want to exit.
6. All the best – Happy Studying

1. The power of a lens of focal length 50 cm is

0.5 D

10.5 cm

0.5 D

Your comments:

Question 1 of 30

2. Kerosene floats on water that means it is lighter than water, but

kerosene is optically rarer than water

kerosene is optically denser than water

both are optically rarer.

both are optically denser

Your comments:

Question 2 of 30

3. Two thin lenses of power +3.5 D and -2.5 D are placed in contact. Find the focal length of the lens combination.

16.7 m

100 cm

1 cm

-16.7 m

Your comments:

Question 3 of 30

4. The mirror used in the construction of shaving glass is

Convex

Plano concave

Plano convex

Concave

Your comments:

Question 4 of 30

5. Rahul is standing in front of a plane mirror. The distance between Rahul and his image is 150cm. If Rahul's distance from the mirror is x. What could be the possible value of x?

x = 100cm

x = 25cm

x = 75m

x = 50 cm

Your comments:

Question 5 of 30

6. Light travels faster in substance X as compared to substance Y, then refractive index is greater for

Substance-Y

Substance-X

Refractive index for both is same

Can’t tell with the information provided

Your comments:

Question 6 of 30

7. The bending of light ray due to change in its speed is

refraction.

diffraction.

reflection.

absorption.

Your comments:

Question 7 of 30

8. A medium through which light propagates easily is a

Transparent medium

Translucent medium

Partially translucent medium

Opaque medium

Your comments:

Question 8 of 30

9. Drop of water behaves likes a

Diverging lens

Concave lens

Convex lens

Both convex and concave

Your comments:

Question 9 of 30

10. An object is 9 cm from a magnifying lens and its image is formed 36 cm from the lens. Magnification of the lens is.

0.25

Your comments:

Question 10 of 30

11. A person having myopic eyes uses a concave lens of focal length 50 cm. What is the power of the lens?

- 2 D

+ 2 D

- 0.02 D

+ 0.02 D

Your comments:

Question 11 of 30

12. A doctor has prescribed a corrective lens of power +1.5 D to one of his patients. The focal length and the nature of the lens is

66.7 cm , converging

- 6.67 cm , diverging

6.67 cm , converging

- 66.7 cm , diverging

Your comments:

Question 12 of 30

13. In order to get a diminished and virtual image, the object can be placed anywhere in front of a:

all these mirrors

Convex mirror

Plane mirror

Concave mirror

Your comments:

Question 13 of 30

14. An object is placed 10 cm from a diverging lens which forms an image 6.5 cm from the lens. What is the focal length of the lens?

+ 3.9 cm

+18.5 cm

- 3.9 cm

-18.5 cm

Your comments:

Question 14 of 30

15. How many foci does a lens have?

One

Four

Two

Three

Your comments:

Question 15 of 30

16. The image formed by plane mirror is

Virtual and inverted

Real and inverted

Virtual and erect

Real and erect

Your comments:

Question 16 of 30

17. Where should an object be placed in front of a convex lens to get a real image of the size of the object?

At infinity

Between the optical centre of the lens and its principal focus.

At twice the focal length

At the principal focus of the lens

Your comments:

Question 17 of 30

18. A student obtained a sharp image of a burning candle, placed at the farther end of a laboratory table, on a screen using a concave mirror. For getting a better value of focal length of the mirror, what should the student do?

He should move the mirror slightly towards the screen.

He should move the mirror as well as the screen towards the newly selected object

He should move only the screen towards the newly selected object.

He should move the mirror away from the screen.

Your comments:

Question 18 of 30

19. SI unit of power of lens is

Metre

Micrometre

Kilometre

Dioptre

Your comments:

Question 19 of 30

20. The refractive index is

Your comments:

Question 20 of 30

21. Which lens has a virtual focus?

Concave lens

Convex lens

Converging lens

Both convex and concave

Your comments:

Question 21 of 30

22. Which one of the following materials cannot be used to make lens?

Water

Plastic

Clay

Glass

Your comments:

Question 22 of 30

23. A ray of light traveling in air falls on the surface of a transparent glass slab at an angle of 60° with the normal to the surface. Find the angle made by the refracted ray with the normal within the glass slab. Refractive index of the material of the glass slab is 1.5

60°

35°

35.26°

25°

Your comments:

Question 23 of 30

24. The expression for the magnification of a spherical mirror in terms of focal length (f) and the distance of the object from mirror (u) is :

f /(u-f)

-f/ (u+f)

f/ (u+f)

-f/ (u-f)

Your comments:

Question 24 of 30

25. Which one is correct as the new cartesian sign conventions?

Object distance is negative when taken from left of pole.

Image distance is positive when taken from left of pole.

All distances are measured from the principal focus

Image always forms above the principal axis.

Your comments:

Question 25 of 30

26. The maximum image distance in case of a concave lens of focal length 'f' is :

Your comments:

Question 26 of 30

27. Where should an object be placed in front of convex lens so as to obtain the image formed on slide projector?

At F₁

At 2 F₁

Beyond F₁

Between F₁ and 2 F₁

Your comments:

Question 27 of 30

28. The unit of linear magnification is

Metre per second

It is unitless

Metre

Dioptre

Your comments:

Question 28 of 30

29. A ray of light incident on the optical centre of a spherical lens, after refraction passes through:

Principal focus

Twice the focal length

Radius of curvature

Optical centre

Your comments:

Question 29 of 30

30. Light enters from air to glass plate having refractive index 1.5. The speed of light in glass is

6.25 x 10⁷ ms^-1

4 x 10⁸ ms^-1

2 x 10⁸ ms^-1

5.5 x 10¹⁰ ms^-1

Your comments:

Question 30 of 30

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