MCQ Class 10 Mathematics Introduction to Trigonometry Introduction to Trigonometric Identities

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. An object is placed on the principal axis of a spherical mirror. The object distance u is:

Definitely negative

Definitely positive

Negative if the object is to the right of the pole

Negative if the object is to the left of the pole

Your comments:

Question 1 of 30

2. Power of a lens is

1/R

1/f

1/v

1/u

Your comments:

Question 2 of 30

3. After reflection through a concave mirror, rays of light

Meet

Appear to meet

Never meet

None of the above

Your comments:

Question 3 of 30

4. If the magnification has a positive sign, the image formed by the concave mirror must be

Virtual and inverted

Real and inverted

Real and erect

Virtual and erect

Your comments:

Question 4 of 30

5. The image formed by a convex lens is virtual when

Object lie between F and O

Object lie between 2F and F

Object is at infinity

Object is at focus

Your comments:

Question 5 of 30

6. Whenever light goes from one medium to another, the characteristic that does not change is:

Wavelength

Velocity

Colour

Frequency

Your comments:

Question 6 of 30

7. A simple magnifying glass consists of:

Convex lens of small focal length

Concave lens

Convex lens of large focal length

Plano-concave lens

Your comments:

Question 7 of 30

8. The size of the image formed by the convex mirror is

Depends on the position of the object

Always smaller than the size of the object

Same as the size of the object

Always greater than the size of the object

Your comments:

Question 8 of 30

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

Substance-X

Substance-Y

Can’t tell with the information provided

Refractive index for both is same

Your comments:

Question 9 of 30

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

At 2 F₁

At F₁

Between F₁ and 2 F₁

Beyond F₁

Your comments:

Question 10 of 30

11. Real image

can be projected on the screen

May or may not be projected on the screen

Cannot be projected on the screen

Projected on the eyes only

Your comments:

Question 11 of 30

12. Which lens always forms a virtual image?

Concave lens

Convex lens

Converging lens

Both convex and concave

Your comments:

Question 12 of 30

13. The lens which is used to correct myopia (shortsightedness) is

Both convex and concave

Concave lens

Converging lens

Convex Lens

Your comments:

Question 13 of 30

14. 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 = 75m

x = 100cm

x = 50 cm

x = 25cm

Your comments:

Question 14 of 30

15. A ray of light travelling in air falls on the surface of a rectangular slab of a plastic material whose refractive index is 1.6. If the incident ray makes an angle of 53° with the normal, find the angle made by the refracted ray with the normal (sin 53° = 4/5)

20°

30°

25°

35°

Your comments:

Question 15 of 30

16. Which kind of a mirror is used to see the enlarged image of the object?

Convex mirror

Plane mirror

Plano-concave mirror

Concave mirror

Your comments:

Question 16 of 30

17. When the image is of the same size as the object, the magnification is

Smaller than one

Greater than one

Equal to one

Zero

Your comments:

Question 17 of 30

18. The focal length of a plane mirror is

Infinity

Zero

- 1

Your comments:

Question 18 of 30

19.

is the lateral inversion of

RFLECTION

REFLECTION

NIOTECLEFER

NOITCELFER

Your comments:

Question 19 of 30

20. An observer moves towards a stationary plane mirror at a speed of 4m/s. The speed of image with respect to mirror is __________.

8 m/s away from the mirror

4m/s towards the mirror

4 m/s away from the mirror

8 m/s towards the mirror

Your comments:

Question 20 of 30

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

Optical centre

Radius of curvature

Principal focus

Twice the focal length

Your comments:

Question 21 of 30

22. The concave mirrors are used in

Reflecting telescopes

Magic lanterns

Cinema projectors

All the above

Your comments:

Question 22 of 30

23. The magnification of a convex mirror is always:

More than 1

Equal to 1

Less than 1

Infinity

Your comments:

Question 23 of 30

24. The mirror formula is valid for

Concave mirror only

Convex mirror only

Plane mirror only

All spherical mirrors

Your comments:

Question 24 of 30

25. When a mirror is rotated through an angle θ, the reflected ray from it turns through an angle of

i / 2

none of the above

Your comments:

Question 25 of 30

26. Which one of the following is the use of concave lens

magnifying glass

objective lens of a microscope and a telescope

in theatre spot lights

all of the above

Your comments:

Question 26 of 30

27. If the speed of light in medium 1 and medium 2 are 2.5 x 10⁸ m/s and 2 x 10⁸ m/s respectively then the refractive index of medium 1 with respect to medium 2 is ___________

2.5 / 3

3 / 2.5

2.5 / 2

2 / 2.5

Your comments:

Question 27 of 30

28. The refractive index is

Your comments:

Question 28 of 30

29. Light changes its path as the medium changes during the transit. This is because of

Change of frequency

Change of wavelength

Change of speed

Change of intensity

Your comments:

Question 29 of 30

30. A spherical mirror and a thin spherical lens have each a focal length of -12 cm. The mirror and the lens are likely to be:

Both concave

Both convex

The mirror is concave and the lens is convex.

The mirror is convex and the lens is concave.

Your comments:

Question 30 of 30

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