Physics (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 45 - 48 of 78

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Question number: 45

» Physics » Magnetism & Electricity at Work

MCQ▾

Question

In an experiment, it was observed that when the length of a wire in an electrical circuit is doubled, everything else remaining same, the current becomes half. On the other hand, if the thickness (diameter) of the wire is doubled, the current becomes 4 times. Two wires W1 and W2 of the same metal have the same current passing through them. The thickness of wire W2 is twice that of W1, then the length of the wire W2 is

Choices

Choice (4) Response

a.

two times that of wire W1

b.

four times that of wire W1

c.

sixteen times that of wire W1

d.

same as that of wire W1

Question number: 46

» Physics » Light

MCQ▾

Question

Two mirrors are placed at right angles to each other as shown in the figure. Total number of images of an object ‘o’ placed between them, which are seen as

Two mirrors at right angle

Two Mirrors at Right Angle

Find the number of images will be shown of an object ‘o’

Choices

Choice (4) Response

a.

two

b.

four

c.

six

d.

three

Question number: 47

» Physics » Motion and Force

MCQ▾

Question

Protons and neutrons are bound in a nucleus by the

Choices

Choice (4) Response

a.

Long range ‘gravitational interaction’

b.

Short range ‘strong interaction’

c.

Short range ‘weak interaction’

d.

Long range ‘electromagnetic interaction’

Question number: 48

» Physics » Motion and Force

MCQ▾

Question

A truck and a car are moving with equal velocity. On applying the brakes both will stop after same distance, then

Choices

Choice (4) Response

a.

Time will not be same

b.

Time will be same

c.

Acceleration is not negative

d.

None of the above

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