Physics (NTSE Stage-1 (State-Level) Scholastic-Aptitude & Language Comprehension): Questions 29 - 34 of 136

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Question number: 29

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

A current flows in a conductor from East to West. The direction of the magnetic field at a point above the conductor is

Choices

Choice (4) Response

a.

towards South

b.

towards North

c.

towards East

d.

towards West

Question number: 30

» Physics » Motion and Force

MCQ▾

Question

The lines of force of uniform magnetic field

Choices

Choice (4) Response

a.

intersect

b.

must be convergent

c.

must be parallel to each other

d.

must be divergent

Question number: 31

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

In a transformer, number of turns in the primary are 140 and that in secondary are 280. If current in primary is 4 A, then current in secondary is

Choices

Choice (4) Response

a.

4A

b.

10A

c.

2A

d.

6A

Question number: 32

» Physics » Light

MCQ▾

Question

Two thin lenses of focal lengths f 1 and f 2 are placed in contact. The focal length of the composite lenses will be

Choices

Choice (4) Response

a.

Equation

b.

Equation

c.

Equation

d.

Equation

Question number: 33

» Physics » Light

MCQ▾

Question

Figure shows when the as shown two rays A and B being reflected by a mirror and going as A’ and B’. The mirror is

Two rays reflected by the mirror

Two Rays Reflected by the Mirror

Find the type of mirror by using reflected rays

Choices

Choice (4) Response

a.

may be any spherical mirror

b.

is plane

c.

is concave

d.

is convex

Question number: 34

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

Which of the following is the most suitable material for making permanent magnet?

Choices

Choice (4) Response

a.

Steel

b.

Soft iron

c.

Copper

d.

Nickel

f Page
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