Physics (NSTSE (National Science Talent Search Exam- Unified Council) Class 10): Questions 1 - 7 of 154

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Question number: 1

» Physics » Light

MCQ▾

Question

The magnification and focal length of a converging lens are and , respectively. The object distance should be:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 2

» Physics » Light

MCQ▾

Question

An image is formed on the centre of the curvature by convex lens, then the object is:

Choices

Choice (4) Response

a.

At focal point

b.

At centre of the curved

c.

Between focal point and centre of the curvature

d.

Far than centre of curvature

Question number: 3

» Physics » Light

MCQ▾

Question

A convex lens is made by cutting a portion of a hollow glass sphere of radius . So, power of the lens is:

Choices

Choice (4) Response

a.

b.

c.

d.

Question number: 4

» Physics » Light

MCQ▾

Question

Two thin lenses of power and are placed in contact. The power of the lens combination is:

Choices

Choice (4) Response

a.

2.5

b.

1

c.

1.5

d.

2

Question number: 5

» Physics » Light

MCQ▾

Question

Which of the following have maximum focal length?

Choices

Choice (4) Response

a.

Plane mirror

b.

Convex mirror

c.

Concave mirror

d.

Convex lens

Question number: 6

» Physics » Light

MCQ▾

Question

Focal length of the convex lens is:

Choices

Choice (4) Response

a.

Sometime positive, sometime negative

b.

Always negative

c.

Always positive

d.

All of the above

Question number: 7

» Physics » Light

MCQ▾

Question

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

Choices

Choice (4) Response

a.

b.

c.

d.

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