Trying to find the right answer to this..

Pre Boards

Practice to excel and get familiar with the paper pattern and the type of questions. Check you answers with answer keys provided.

Sample Papers

Download the PDF Sample Papers Free for off line practice and view the Solutions online.

CBSE Class 10 Science Solved Question Paper 2012

Short Answer Type

21.

State one role of ciliary muscles in the human eye?

1414 Views

22. To construct ray diagram we use two light rays which are so chosen that it is easy to know their directions after reflection from the mirror. List these two rays and state the path of these rays after reflection. Use these rays to locate the image of an object placed between centre of curvature and focus of a concave mirror.

919 Views

23.

What is the colour of the sky during day time? Give reason for it?

504 Views

24.

Draw a labelled ray diagram to illustrate the dispersion of a narrow beam of white light when it passes through a glass prism.

1218 Views

25. A 5 cm tall object is placed perpendicular to the principle axis of a convex lens of focal length 12 cm. The distance of the object from the lens is 8 cm. Using the lens formula, find the position, size and nature of the image formed.

795 Views

26.
State the types of mirrors used for: i) headlights and ii) rear view mirror, in cars and motorcycles. Give to justify your answer in each case.

i) Concave mirrors are used for headlights as it gives larger area of magnification for the light.

ii) Convex mirrors give a virtual, erect, and diminished image of the objects placed in front of them. They are preferred as a rear-view mirror in vehicles because they give a wider field of view, which allows the driver to see most of the traffic behind him.

1115 Views

27. An old man cannot see objects closer than 1 m from the eye clearly. Name the defect of vision he is suffering from. How can it be corrected? Draw ray diagram for the:

(i) defect of vision and also (ii) for its correction.

1697 Views