# NSTSE (National Science Talent Search Exam- Unified Council) Class 10: Questions 1024 - 1029 of 1484

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## Question 1024

### Question

MCQ▾

If power of a lens is , then radius of the curvature of the lens is:

### Choices

Choice (4)Response

a.

b.

c.

d.

## Question 1025

### Question

MCQ▾

By which of the following mirror we can get long and thin image?

### Choices

Choice (4)Response

a.

Cylindrical mirror

b.

Concave mirror

c.

Parabolic mirror

d.

Convex mirror

## Question 1026

### Question

MCQ▾

If an object is placed between focal point and centre of curvature of converging lens, then characteristics of its image will be:

### Choices

Choice (4)Response

a.

Real, inverting, diminished

b.

Virtual, upright, diminished

c.

Virtual, upright, enlarged

d.

Real, inverting, enlarged

## Question 1027

### Question

MCQ▾

In an optical instrument, if we replaced lens having focal length of the lens becomes times than original lens, then its power of the instrument is charged by factor:

### Choices

Choice (4)Response

a.

b.

3

c.

6

d.

## Question 1028

### Question

MCQ▾

A converging lens has a focal length of . If an object is placed from the centre of lens, then image is:

### Choices

Choice (4)Response

a.

Real, Erect, Enlarged

b.

Real, Inverted, Diminished

c.

Real, Erect, Same height

d.

Virtual, Inverted, Same height

## Question 1029

### Question

MCQ▾

Which of the following mirror is used for focusing light?

### Choices

Choice (4)Response

a.

Concave

b.

Convex

c.

Plane mirror

d.

Plane-convex mirror

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