Physics [NSTSE (National Science Talent Search Exam- Unified Council) Class 8]: Questions 127 - 133 of 219

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Question number: 127

» Physics » Light

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MCQ▾

Question

Which mirror is used in house to look at ourselves?

Choices

Choice (4)Response

a.

Convex lens

b.

Concave mirror

c.

Plane mirror

d.

Convex mirror

Question number: 128

» Physics » Chemical Effects of Electric Current

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MCQ▾

Question

In dry cell, electrolyte is in form of:

Choices

Choice (4)Response

a.

paste

b.

gas

c.

solid

d.

liquid

Question number: 129

» Physics » Light

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MCQ▾

Question

Which of the following helps to control the amount of light entering the eye by contracting or dilating?

Choices

Choice (4)Response

a.

Retina

b.

Pupil

c.

Iris

d.

Cornea

Question number: 130

» Physics » Friction

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MCQ▾

Question

A wooden block is sliding on a surface of horizontal table. The friction can be increases by:

Choices

Choice (4)Response

a.

By polishing the surface of table

b.

Decreasing the area of contact surface

c.

By putting more mass on the block

d.

Decreasing the mass of the block

Question number: 131

» Physics » Light

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MCQ▾

Question

An object is placed in front of a lens, and its image can be obtained on a screen which placed opposite side of lens. This image is called:

Choices

Choice (4)Response

a.

Virtual image

b.

Lateral image

c.

Inverted image

d.

Real image

Question number: 132

» Physics » Light

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MCQ▾

Question

Which of the following part protects the human eye?

Choices

Choice (4)Response

a.

Blind spot

b.

Cornea

c.

Iris

d.

Pupil

Question number: 133

» Physics » Friction

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MCQ▾

Question

When a meteor entering in earth’s atmosphere, it stars burn because of:

Choices

Choice (4)Response

a.

Heat of the earth

b.

Excessive friction

c.

Solar radiation

d.

Atmospheric pressure

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