NSO Level 1- Science Olympiad (SOF) Class 10: Questions 73 - 79 of 1497

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Question 73

Question MCQ▾

Power of a lens is . Which of the following lens is it?

Choices

Choice (4)Response

a.

Concave lens

b.

Convex lens

c.

Plane lens

d.

All of the above

Edit

Question 74

Question MCQ▾

If the radius of curvature of a lens is , then its focal length is:

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 75

Question MCQ▾

If an object is at the distance of 25 cm from the plane mirror, then how far its image is formed from the plane mirror?

Choices

Choice (4)Response

a.

25

b.

15

c.

20

d.

30

Edit

Question 76

Question MCQ▾

An object is placed at a distance of from a concave lens of focal length of . The image distance is:

Choices

Choice (4)Response

a.

b.

75

c.

d.

Edit

Question 77

Question MCQ▾

If the focal length of a curved mirror is , then which of the following is correct?

Choices

Choice (4)Response

a.

Radius of curvature of the mirror is 22 cm

b.

Radius of curvature of the mirror is 44 cm

c.

The mirror is converging

d.

The mirror is diverging

Edit

Question 78

Question MCQ▾

If a ray of light is incident normally in a glass slab, then angle of refraction is:

Choices

Choice (4)Response

a.

b.

c.

d.

Edit

Question 79

Question MCQ▾

An object is placed at the focus of a convex lens. The image will formed:

Choices

Choice (4)Response

a.

No image is formed

b.

Between focal point and centre of lens

c.

At radius of curvature of the lens

d.

At focal point other side of lens

Edit