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CBSE 10th Standard Science Subject Light Reflection and Refraction Ncert Exemplar MCQ Questions With Solution 2021

Published on: 25/05/2021

QB365 Provides the updated NCERT Exemplar Questions for Class
10, and also provide the detail solution for each and every NCERT Exemplar questions. NCERT Exemplar questions are latest updated question pattern from NCERT, QB365 will helps to get more marks in Exams

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Std: 10th Standard CBSE - Science

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Questions:

Multiple Choice Question

5 x 1 = 5

You are given water, mustard oil, glycerine and kerosene. In which of these media a ray light incident obliquely at same angle would bend the most?

(a)

Kerosene

(b)

Water

(c)

Mustard oil

(d)

Glycerine

In torches search lights and headlights of vehicles the bulb is placed

(a)

between the pole and the focus of the reflector

(b)

very near to the focus of the reflector

(c)

between the focus and centre of curvature of the reflector

(d)

at the centre of curvature of the reflector.

Rays from Sun converge at a point 15 cm in front of a concave mirror. Where an object should be placed so that size of its image is equal to the size of the object?

(a)

30 cm in front of the mirror

(b)

15 cm in front of the mirror

(c)

between 15 cm and 30 cm in front of the mirror

(d)

more than 30 cm in front of the mirror.

Which of the following statements is true?

(a)

A convex lens has 4 dioptre power having a focal length 0.25 m

(b)

A convex lens has -4 dioptre power having a focal length 0.25 m

(c)

A concave lens has 4 dioptre power having a focal length 0.25 m

(d)

A concave lens has -4 dioptre power having a focal length 0.25 m.

A 10 mm long awl pin is placed vertically in front of a concave mirror. A 5 mm long image of the awl pin is formed at 30 cm in front of the mirror. The focal length of this mirror is.

(a)

- 30 cm

(b)

- 20 cm

(c)

- 40 cm

(d)

- 60 cm