eVidyarthi

Class 10,Mathematics, Real Numbers (Fundamental Theorem of Arithmetic)

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 4 cm tall is placed in front of a convex lens. It produces an image 3 cm tall. What is the magnification of the lens?
 
 
 

Question 1 of 30

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

Question 2 of 30

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

Question 3 of 30

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

Question 4 of 30

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

Question 5 of 30

6. If the focal length of a spherical mirror is – 20 cm, then it is a:
 
 
 
 

Question 6 of 30

7. A concave mirror of focal length ‘f’ produces an image ‘n’ times farther than the object. If the image is real, then the distance of the object from the mirror is:
 
 
 
 

Question 7 of 30

8. According to the new cartesian sign convention,
 
 
 
 

Question 8 of 30

9. Which lens always forms a virtual image?
 
 
 
 

Question 9 of 30

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

Question 10 of 30

11. After refraction through a rectangular glass slab the emergent ray is
 
 
 
 

Question 11 of 30

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

Question 12 of 30

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

Question 13 of 30

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

Question 14 of 30

15. The combination of a convex lens of power +2D and a concave lens of power -2D, acts as a
 
 
 
 

Question 15 of 30

16. The maximum image distance in case of a concave lens of focal length ‘f’ is :
 
 
 
 

Question 16 of 30

17. The mirror used as rear view mirror is
 
 
 
 

Question 17 of 30

18. Drop of water behaves likes a
 
 
 
 

Question 18 of 30

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

Question 19 of 30

20. An object is placed 60 cm in front of a concave mirror. The real image formed by the mirror is located 30 cm in front of the mirror. What is the object’s magnification?
 
 
 
 

Question 20 of 30

21. What will happen when a ray enters from glass to air medium?
 
 
 
 

Question 21 of 30

22. If the image formed by a concave mirror is observed to be virtual, erect and larger than the object then the position of the object will be
 
 
 
 

Question 22 of 30

23. The distance at which an object should be placed from a thin convex lens of focal length 10 cm to obtain a virtual image of double of its size is
 
 
 
 

Question 23 of 30

24. A big shinny spoon is a good example of
 
 
 
 

Question 24 of 30

25. If h’ is the size of the image and h the size of object .The magnification for a spherical mirror is
 
 
 
 

Question 25 of 30

26. The concave mirrors are used in
 
 
 
 

Question 26 of 30

27. To determine the focal length of convex lens by obtaining a sharp image of a distant object we generally follow the following steps which are not in proper sequence.
(a) Hold the lens between the object and the screen
(b) Measure the distance between the lens and the screen
(c) Select a well lit distant object
(d) Adjust the position of the lens to form a sharp image
The correct sequence will be:
 
 
 
 

Question 27 of 30

28. When an object is placed at a distance of 5 cm in front of a convex mirror of focal length 10 cm, then:
 
 
 
 

Question 28 of 30

29. For spherical mirrors
 
 
 
 

Question 29 of 30

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

Question 30 of 30