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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