Physics (NTSE Stage-2 (National-Level) Scholastic-Aptitude & Language Comprehension): Questions 12 - 15 of 78

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Question number: 12

» Physics » Work and Energy

Appeared in Year: 2013

MCQ▾

Question

A geo-stationary satellite is orbiting around earth at height of 30, 000 km in circular orbit. The radius of the earth is taken as 6000 km. The geo-stationary satellite comes back to its position after one revolution in exacity 24 h. Let the acceleration due to gravity (g) be 10 m/s 2 and mass of satellite be 1000 kg, calculate the work done in 12 h when moving under gravitational force.

Choices

Choice (4) Response
a.

0J

b.

3.6π×1014J

c.

2π×7.2π×1014J

d.

1.8π×1014J

Question number: 13

» Physics » Measurement

Appeared in Year: 2013

MCQ▾

Question

A hypothetical planet has density ρ . radius R, and surface gravitational acceleration g. If the radius of the planet was doubled, but the planetary density stayed the same, the acceleration due to gravity at the planet’s surface would be:

Choices

Choice (4) Response
a.

4g

b.

g/2

c.

g

d.

2g

Question number: 14

» Physics » The Universe

MCQ▾

Question

Atmospheric pressure at the center of a tropical cyclone is

Choices

Choice (4) Response
a.

normal

b.

very high

c.

zero

d.

very low

Question number: 15

» Physics » Motion and Force

MCQ▾

Question

Which of the following cuboid will exert maximum pressure, when applied thrust is same?

shows image of cuboid

Shows Image of Cuboid

Find the cuboid which will exert maximum pressure, when applied thrust is same

Choices

Choice (4) Response
a.

a

b.

b

c.

c

d.

d

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