CBSE Class 10 Science Question Paper 2019 Set 14 Solved

CBSE Class 10 Science Question Paper Solved 2019 Set N. Students can download the last year board exams question papers using the link below. Free download of examination question papers with solutions. Last 10 year question papers should be practised to get better marks in examinations.

SECTION A

1. State the S.I. unit of potential difference and name the device used to measure it.

2. List two characteristics of a good fuel.

SECTION B

3. Draw a labelled ray diagram to show the path of the reflected ray corresponding to the ray which is directed towards the principal focus of a convex mirror. Mark the angle of incidence and angle of reflection on it.

4. List four properties of magnetic field lines.

5. What is brine ? What happens when an electric current is passed through it ? Write chemical equation for it.

OR

List the changes that are observed when dil. HCl is added to a small amount of copper oxide in a beaker. Write balanced chemical equation for the reaction.

SECTION C

6. A concave mirror has a focal length of 20 cm. At what distance from the mirror should a 4 cm tall object be placed so that it forms an image at a distance of 30 cm from the mirror ? Also calculate the size of the image formed.

OR

A real image 2/3^rd of the size of an object is formed by a convex lens when the object is at a distance of 12 cm from it. Find the focal length of the lens.

7. Draw the pattern of the field lines of the magnetic field around a current carrying straight conductor passing through and held perpendicular to a horizontal cardboard. State right-hand thumb rule and explain how this rule is useful to determine the direction of the magnetic field in the above case, if the direction of current in the conductor is vertically downwards. 

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