NSO Level 1- Science Olympiad (SOF) Class 10: Questions 928 - 933 of 986

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Passage

Directional: Read the passage carefully and the answer the below two question

Optical fibers are generally composed of silica, with an index of refraction around

Question number: 928 (2 of 2 Based on Passage) Show Passage

» Light - Reflection and Refraction

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MCQ▾

Question

How fast does light travel in a silica fiber?

Choices

Choice (4)Response

a.

b.

c.

d.

Question number: 929

» Magnetic Effects of Electric Current

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MCQ▾

Question

A circular loop placed in a plane perpendicular to the plane of paper carries a current when the key is ON. The current as seen from points A and B (in the plane of paper and on the axis of the coil) is anti-clockwise and clockwise respectively. The magnetic field lines point from B to A. The N-pole of the resultant magnet is on the face close to

The magnetic field lines point from B to A

The Magnetic Field Lines Point from B to A

Choices

Choice (4)Response

a.

2

b.

3

c.

4

d.

1

Passage

Directional: Read the passage carefully and the answer the below two question

The angle of incidence of a light ray incident through air on the boundary separating air from water so that the angle of refraction is 30°.

Refractive index of air is and that of water is

Question number: 930 (1 of 2 Based on Passage) Show Passage

» Light - Reflection and Refraction

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MCQ▾

Question

What should be the angle of incidence of a light ray incident through air on the boundary separating air from water so that the angle of refraction is

Choices

Choice (4)Response

a.

b.

c.

d.

40.7°

Question number: 931 (2 of 2 Based on Passage) Show Passage

» Light - Reflection and Refraction

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MCQ▾

Question

Angle of incidence means

Choices

Choice (4)Response

a.

The angle between an incident ray and the normal

b.

The angle between an incident ray and refracted ray

c.

The angle between a refracted ray and the normal

d.

All of the above

Question number: 932

» Metals and Non - Metals

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MCQ▾

Question

Given

The Most reactive metal is

Choices

Choice (4)Response

a.

Cu

b.

Ag

c.

Mg

d.

Zn

Question number: 933

» Metals and Non - Metals

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MCQ▾

Question

Given

The Least reactive metal is

Choices

Choice (4)Response

a.

Cu

b.

Fe

c.

Sn

d.

Na

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