# NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 1044 - 1050 of 1484

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## Question number: 1044

Edit
MCQ▾

### Question

Observe the following figure.

Figure shows, the light ray is passing through a glass slab. Which ray is emergent ray?

### Choices

Choice (4) Response

a.

OP

b.

NO

c.

MN

d.

There is no emergent ray

## Question number: 1045

Edit
MCQ▾

### Question

If we formed an image by a convex lens, and after that we changed lens by another thin lens, then which of the following does not affect?

### Choices

Choice (4) Response

a.

Refractive index of lens

b.

Image distance

c.

Thickness of lens

d.

Object distance

## Question number: 1046

Edit
MCQ▾

### Question

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

## Question number: 1047

Edit
MCQ▾

### Question

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

### Choices

Choice (4) Response

a.

b.

c.

d.

## Question number: 1048

Edit
MCQ▾

### Question

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

## Question number: 1049

Edit
MCQ▾

### Question

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.

## Question number: 1050

Edit
MCQ▾

### Question

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

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