Physics 9 Unit 5 MCQs Tests

In this post, we have prepared 4 MCQs test of Federal Board Physics 9 Unit 5 MCQs Tests.

Physics 9 Unit 5 MCQs Tests

Practice MCQs Test No 1

11

Class 9 Physics
Unit 5
Practice MCQs Test No 1

1 / 10

The orbital speed of a low orbit satellite is:

zero

8000 { ms }^{ -1 }

800 { ms }^{ -1 }

8 { ms }^{ -1 }

2 / 10

Unit of gravitational field strength is:

N

N { kg }^{ -1 }

J

N m

3 / 10

Value of g increases with the:

decrease in altitude

increase in altitude

none of the above

Increase in mass of body

4 / 10

The value of g at a height one Earth's radius above the surface of Earth is:

1/2 g

1/3 g

2 g

1/4 g

5 / 10

The altitude of geostationary orbits in which communications satellites are launched above the surface of Earth is:

42300 km

850 km

6400 km

1000 km

6 / 10

Speed of GPS satellite is:

5.6 { kms }^{ -1 }

3.87 { kms }^{ -1 }

7.9 { kms }^{ -1 }

5.0 { kms }^{ -1 }

7 / 10

_________ predicted about artificial satellites about 300 years ago.

Galileo

Einstein

Newton

Faraday

8 / 10

Earth's gravitational force of attraction vanishes at:

42300 km

1000 km

6400 km

infinity

9 / 10

Distance of moon from Earth is?

38, 000 km

30, 000 km

3, 80, 000 km

3, 000, 000 km

10 / 10

The value of g on moon's surface is 1.6 ms¯². What will be the weight of a 100 kg body on the surface of the moon?

100 N

1600 N

160 N

1000 N

Your score is

Practice MCQs Test No 2

6

Class 9 Physics
Unit 5
Practice MCQs Test No 2

1 / 10

What is not true about g?

g is different at different places

g is greater at poles

g decrease as go higher

g is less at poles

2 / 10

The mass of Earth is approximately:

6.0 x { 10 }^{ 24 } kg

5500 x { 10 }^{ 24 } kg

6.9 x { 10 }^{ 24 } kg

6.0 x{ 10 }^{ -24 } kg

3 / 10

When an object is at a height equal to radius of earth above the surface of the earth. What is the value of gh

g/2

2g

4g

g/4

4 / 10

As we go up the value of G becomes:

Doubled

Decreases

Increases

Unchanged

5 / 10

The force which pulls the object towards the center of circle is known as force:

Coulomb

Gravitational

Centripetal

Frictional

6 / 10

If the distance between two masses is half then the force of gravitation becomes:

Doubled

One fourth

Four times

Half

7 / 10

What will be the value of G if mass of the earth becomes four times:

Four times

Doubled

One fourth

No change

8 / 10

The SI unit of gravitational force is:

Newton

{ ms }^{ -2 }

{ Nm }^{ 2 }{ kg }^{ -2 }

both "a" and "b"

9 / 10

Radius of earth is:

6 x { 10 }^{ 6 } km

6.4 x { 10 }^{ 6 }m

6 x { 10 }^{ 6 } m

6.4 x { 10 }^{ 6 } km

10 / 10

In System International, the value of G is:

6.67 x { 10 }^{ 11 }{ Nm }^{ 2 }{ kg }^{ -2 }

6.67 x { 10 }^{ -11 }{ Nm }^{ 2 }{ kg }^{ -2 }

6.4 x { 10 }^{ 6 }{ Nm }^{ 2 }{ kg }^{ -2 }

6.4 x { 10 }^{ -11 }{ Nm }^{ 2 }{ kg }^{ -2 }

Your score is

Practice MCQs Test No 3

4

Class 9 Physics
Unit 5
Practice MCQs Test No 3

1 / 10

Height of the Geostationary satellite above the surface of earth is:

3600 km

1000 km

42300 km

36000 km

2 / 10

Relative velocity of Geostationary satellite with respect to earth is:

7.9{ kms }^{ -1 }

11.2{ kms }^{ -1 }

9.8{ ms }^{ -1 }

Zero

3 / 10

If mass of both the bodies is 1 kg and distance between their centers is lin then the gravitational force will be equal to:

None of above

g

G

V

4 / 10

Weight of the body of mass 10 kg on the surface of moon:

None of above

1.62N

16N

160 N

5 / 10

If a rocket is fired vertically with a speed of it will start revolving around the earth:

9.8{ ms }^{ -1 }

8{ ms }^{ -1 }

11.2{ kms }^{ -1 }

8{ kms }^{ -1 }

6 / 10

On mountains our weight will be ____________ as compared to weight on the surface of earth.

Less

None of above

Equal

Greater

7 / 10

A satellite is revolving around the earth in a circular orbit. If the radius of the orbit is increased from R to 2R. What will be its velocity?

sqrt { 2 }v[/katex

v/2

frac { v }{ sqrt { 2 } }

{ v }^{ 2 }

8 / 10

If the weight of an object on the surface of earth is W. Its weight on the surface of moon will be:

6W

W/8

W/4

W/6

9 / 10

Gravitational force on the surface of earth is equal to:

All of above

W

g

G

10 / 10

An artificial satellite keeps on revolving around the earth in different orbits with uniform speed due to the?

Gravitational force

Electromagnetic force

Frictional force

Coulmb force

Your score is

Challenge MCQs Test

13

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Class 9 Physics
Unit 5
Full Chapter Challenge Test

1 / 30

What is not true about g?

g is less at poles

g is different at different places

g is greater at poles

g decrease as go higher

2 / 30

Weight of the body of mass 10 kg on the surface of moon:

1.62N

160 N

None of above

16N

3 / 30

If the weight of an object on the surface of earth is W. Its weight on the surface of moon will be:

W/8

6W

W/6

W/4

4 / 30

The force which pulls the object towards the center of circle is known as force:

Gravitational

Frictional

Coulomb

Centripetal

5 / 30

If mass of both the bodies is 1 kg and distance between their centers is lin then the gravitational force will be equal to:

G

g

V

None of above

6 / 30

_________ predicted about artificial satellites about 300 years ago.

Faraday

Newton

Einstein

Galileo

7 / 30

Height of the Geostationary satellite above the surface of earth is:

42300 km

1000 km

3600 km

36000 km

8 / 30

A satellite is revolving around the earth in a circular orbit. If the radius of the orbit is increased from R to 2R. What will be its velocity?

v/2

sqrt { 2 }v[/katex

{ v }^{ 2 }

frac { v }{ sqrt { 2 } }

9 / 30

Unit of gravitational field strength is:

N m

J

N { kg }^{ -1 }

N

10 / 30

The altitude of geostationary orbits in which communications satellites are launched above the surface of Earth is:

850 km

1000 km

6400 km

42300 km

11 / 30

The mass of Earth is approximately:

5500 x { 10 }^{ 24 } kg

6.0 x{ 10 }^{ -24 } kg

6.0 x { 10 }^{ 24 } kg

6.9 x { 10 }^{ 24 } kg

12 / 30

In System International, the value of G is:

6.4 x { 10 }^{ 6 }{ Nm }^{ 2 }{ kg }^{ -2 }

6.67 x { 10 }^{ 11 }{ Nm }^{ 2 }{ kg }^{ -2 }

6.4 x { 10 }^{ -11 }{ Nm }^{ 2 }{ kg }^{ -2 }

6.67 x { 10 }^{ -11 }{ Nm }^{ 2 }{ kg }^{ -2 }

13 / 30

Value of g increases with the:

decrease in altitude

none of the above

increase in altitude

Increase in mass of body

14 / 30

Radius of earth is:

6.4 x { 10 }^{ 6 }m

6 x { 10 }^{ 6 } m

6.4 x { 10 }^{ 6 } km

6 x { 10 }^{ 6 } km

15 / 30

An artificial satellite keeps on revolving around the earth in different orbits with uniform speed due to the?

Electromagnetic force

Gravitational force

Coulmb force

Frictional force

16 / 30

Speed of GPS satellite is:

3.87 { kms }^{ -1 }

7.9 { kms }^{ -1 }

5.0 { kms }^{ -1 }

5.6 { kms }^{ -1 }

17 / 30

The SI unit of gravitational force is:

{ Nm }^{ 2 }{ kg }^{ -2 }

both "a" and "b"

{ ms }^{ -2 }

Newton

18 / 30

Relative velocity of Geostationary satellite with respect to earth is:

9.8{ ms }^{ -1 }

11.2{ kms }^{ -1 }

Zero

7.9{ kms }^{ -1 }

19 / 30

On mountains our weight will be ____________ as compared to weight on the surface of earth.

Less

Greater

Equal

None of above

20 / 30

As we go up the value of G becomes:

Doubled

Unchanged

Increases

Decreases

21 / 30

If a rocket is fired vertically with a speed of it will start revolving around the earth:

9.8{ ms }^{ -1 }

8{ kms }^{ -1 }

8{ ms }^{ -1 }

11.2{ kms }^{ -1 }

22 / 30

Distance of moon from Earth is?

38, 000 km

3, 80, 000 km

3, 000, 000 km

30, 000 km

23 / 30

The value of g on moon's surface is 1.6 ms¯². What will be the weight of a 100 kg body on the surface of the moon?

100 N

1600 N

160 N

1000 N

24 / 30

What will be the value of G if mass of the earth becomes four times:

No change

Doubled

Four times

One fourth

25 / 30

The orbital speed of a low orbit satellite is:

800 { ms }^{ -1 }

8 { ms }^{ -1 }

zero

8000 { ms }^{ -1 }

26 / 30

The value of g at a height one Earth's radius above the surface of Earth is:

2 g

1/3 g

1/2 g

1/4 g

27 / 30

When an object is at a height equal to radius of earth above the surface of the earth. What is the value of gh

2g

g/4

g/2

4g

28 / 30

If the distance between two masses is half then the force of gravitation becomes:

Half

Doubled

Four times

One fourth

29 / 30

Gravitational force on the surface of earth is equal to:

W

g

All of above

G

30 / 30

Earth's gravitational force of attraction vanishes at:

1000 km

infinity

6400 km

42300 km

Your score is