Physics (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 67 - 70 of 73

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Question number: 67

» Physics » Light

MCQ▾

Question

Consider the following: To protect yourself from lightening you will

I. go under a building and small trees.

II. Crouch on your feet.

III. stand on the ground.

IV. lie on the ground.

Which of the above is/are correct?

Choices

Choice (4) Response

a.

II and III

b.

III and IV

c.

I and IV

d.

I and II

Question number: 68

» Physics » Motion and Force

MCQ▾

Question

An electron moving with uniform velocity in x direction enters a region of uniform magnetic field along y direction. Which of the following physical quantity (ies) is (are) non-zero and remain constant?

A graph of moving electron along x axis

A Graph of Moving Electron Along X Axis

Electron is moving in x direction with uniform velocity then enters to uniform magnetic field

I. Velocity of the electron.

II. Magnitude of the momentum of the electron.

III. Force on the electron.

IV. The kinetic energy of electron.

Choices

Choice (4) Response

a.

Only II and IV

b.

All four

c.

Only I and II

d.

Only III and IV

Question number: 69

» Physics » Motion and Force

MCQ▾

Question

Graph of Distance vs. Time

Graph of Distance vs. Time

Showing the graph of Distance vs. Time and slope made by it

This graph shows

Choices

Choice (4) Response

a.

Constant acceleration

b.

Constant velocity

c.

Constant speed

d.

All of the above

Question number: 70

» Physics » Motion and Force

MCQ▾

Question

Consider the following statements

I. Grease is used to reduce friction in bicycle chain.

II. Ball bearings are used to reduce friction in a fan.

III. Oil can be used to increase friction in a car engine.

IV. Talc can be used to reduce friction when an object is sliding on a surface.

Which of the above statement (s) is/are correct?

Choices

Choice (4) Response

a.

I, II, and III

b.

I, III, and IV

c.

I, II, and IV

d.

II, III, and IV

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