Monday , January 18 2021 # 10 Science Solved Sample Paper 5

As per 2019 CBSE Question Paper Design

Class: 10th Class CBSE
Subject: Science
Time Allowed: 3 Hours
Maximum Marks: 80

General Instructions:

• The question paper comprises five sections: A, B, C, D and E. You are to attempt both the sections.
• All questions are compulsory.
• Internal choice is given in sections B, C, E and E.
• Question numbers 1 and 2 in sections A are one marks questions. They are to be answered in one words or in one sentence.
• Question numbers 3 to 5 in sections B are two marks questions. These are to be answered in 30 words each.
• Question numbers 6 to 15 in sections C are three marks questions. These are to be answered in about 50 words each.
• Question numbers 16 to 21 in sections D are five marks questions. These are to be answered in 70 words each.
• Question numbers 22 to 27 in sections E are based on practical skills. Each questions is a two marks question. These are to be answered in brief.

10 Science Solved Sample Paper 5 – Page 1

## Section B

#### Question: 3. When a concave mirror is placed facing the sun, the sun’s rays converge to a point 10 cm from the mirror. Now, an erect, 2 cm-long pin is placed 20 cm away on the principal axis of the mirror. If you want to get the image of the pin on a card, where would you place the card? What would be the nature of the image? 

Answer: f = – 10 cm, u = – 20 cm
As we know, 1/v = 1/f – 1/u = 1/-10 – -1/20 ⇒ v = -20 cm
Object is placed at C, therefore image is also at C. Nature → Real, inverted and same size.