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CUET Level I Mock Test 9 (Physics)

Total questions: 45

Worksheet time: 2hrs 15mins

Name
Class
Date
1.

2 satellite or orbiting around the earth in circular orbits of the same radius the mass of statellight A use 5 times greater than the mass of satellite be there periods of revaluation or in the ratio

a)

1:1

b)

1:10

c)

5:1

d)

1:5

2.

If the distance between the Earth and the Sun becomes half of its present value the number of days in a year would have been

a)

64.5

b)

129

c)

182.5

d)

730

3.

A satellite in a circular orbit of radius or has been period of 4 hours yes satellite of arbit radium4 hours around them same planet will have period

a)

8h

b)

16h

c)

32h

d)

64h

4.

The rotation period of an Earth satellite close to the surface of these 83 minutes the time period of another earth satellite in and orbital distance of 3 Earth radii from its surface will be

a)

83 min

b)

83×√8 min

c)

664 min

d)

249 min

5.

Figure shows there elliptical path of a Planet about the sun that two share that part have equal area if T1 and t2 the time taken by the planet to go from a to b and from c to d respectively then

a)

T1<t2

b)

T1=t2

c)

T1>t2

d)

Insufficient information to diduse the relation between t1 and t2

6.

A satellite to go Salon and elliptical Baat around here the rate of change of Arc length by the satellite is proportional to

a)

r

b)

r2

c)

r1/2

d)

r-1

7.

A comet orbits the sun in a highly elliptical Orbit the comet have a constant

a)

Angular speed

b)

Angular momentum

c)

Potential energy

d)

Kinetic energy

8.

The law of area is a consequence of the law of conservation of

a)

Angular momentum

b)

Linear momentum

c)

Energy

d)

Mass

9.

Two particles of equal mass M Go Round yes circle of radius or under the action of their mutual gravitational attraction the speed of each particle is

a)

V=1/2r √1/Gm

b)

V=√Gm/2R

c)

V=1/2√Gm/R

d)

V=√4Gm/R

10.

Newton's law of gravitation is valid for

a)

Small bodies only

b)

Planets only

c)

Both small and big bodies

d)

Only valid for solar system

11.

Binary star system consists of 2 Stars One store has twice the mass of the other the star rotates about their common centre of mass which of the following statement is correct

a)

StarStar having the smaller mass has twice angular momentum compared to heavier star

b)

Both stars have same angular Momentum about centre of mass

c)

Both stars has same linear speed

d)

Both the stars have same kinetic energy

12.

Two uniform solid surface of equal radii are but mass M and 4 m have a Centre to Centre separation 6 hour as shown in the figure

a)

R

b)

√2r

c)

√3r

d)

2r

13.

In considering motion of an object under the gravitational influence of another object which of the following quantity is not conserved

a)

Angular momentum

b)

Total energy

c)

Linear momentum

d)

Mass of th object

14.

A body weights 63n on the surface of the earth what is the gravitational force on it due to the earth RTR height equal to half the radius of the earth

a)

24n

b)

28n

c)

32n

d)

36n

15.

Yeah Saturn year is 29.5 times the earth year how far is the saturn from the sun if the earth is1. 5× 108 km away from the sun

a)

1.2×109km

b)

1.3×109km

c)

1.4 × 109km

d)

1.5×109km

16.

Two solid spherical planets of equal radio or having masses Forum and antonym have their Central separated by year distance 6 hour projectile of mass M is sent from the planet of mass 4 m towards the heavier planet what is distance or of the point from the lighter planet where the gravitational force on the projectile is zero

a)

1.4R

b)

1.8R

c)

1.5R

d)

2.4R

17.

The period of rotation of the earth so as to make any object weightless on its equator is

a)

84 min

b)

74 min

c)

64 min

d)

54 min

18.

If the earth where to stop rotating the value of the acceleration due to gravity at Delhi

a)

Increases

b)

Decreases

c)

Is unchanged

d)

Becomes zero

19.

Which of the following statement is wrong the acceleration due to gravity g- decreases if

a)

We go down from the surface of the earth towards it's centre

b)

We go up from surface of the earth

c)

We go from the equator towards the poles on the surface of the earth

d)

The rotational velocity of the earth is increased

20.

If the mass of the planet is 10% less than that of the Earth and the radius 20% greater than that of the earth the acceleration due to gravity on the planet will be

a)

5/8 times on the surface of the earth

b)

3/4 times that on the surface of the earth

c)

1/2 times that on the surface of the earth

d)

9/10 that on the surface of the earth

21.

Star suddenly strings and its density becomes 109times the original value the value of acceleration due to Gravitation on its a fish will increase by a factor of

a)

106

b)

109

c)

1019

d)

1021

22.

Are the radius of the earth shrinks by 1%its mass remaining the same the percentage change in the value of GS

a)

-2%

b)

+2%

c)

-3%

d)

+4%

23.

With what angular velocity of the earth should spin in order that a body lying at 45 degree latitude may become weightless

a)

√g/R

b)

√2g/R

c)

2√g/R

d)

None of these

24.

The mass of the earth is 81 times that of the Moon and the radius of the year is 3.5 times that the of the Moon the rate jio of the acceleration due to gravity at the surface of the moon to that at the surface of the

a)

0.15

b)

0.04

c)

1

d)

6

25.

Mouse has about 1/10 of Greater diameter the acceleration of falling body and mass in nearly

a)

9.8ms-2

b)

1.96ms-2

c)

3.92ms-2

d)

4.9ms-2

26.

Suppose that the acceleration of free fall at the surface of a distance planet where found to be equal to the tat the surface of Earth if the diameter of the planet where twice the diameter of year then the ratio of main density of the planet to the to the earth would be

a)

4:1

b)

2:1

c)

1:1

d)

1:2

27.

A planet has twice that density of earth but the acceleration due to gravity on its surface is exactly the same as on the surface of earth its radius in terms of radius of the earth will be

a)

R/4

b)

R/2

c)

R/3

d)

R/8

28.

Our body is taken from the surface of the Earth to the Moon what will be the change in the weight of the body

a)

Increase

b)

Decrease

c)

Remains same

d)

First decrease and then increase

29.

If the change in the value of GRT height above the surface of the Earth is the same as at a depth x below it then

a)

X=h

b)

X=2h

c)

X=(1/2) h

d)

X=h2

30.

Choose the correct alternative

a)

Acceleration due to gravity increases with altitude

b)

Acceleration due to gravity increases with increasing depth

c)

Acceleration due to gravity is independent of mass of the earth

d)

The formula -GM [1/r2-1/r1 ] is more accurate thn formula mg(r2-r1) for the difference of potential energy between two points r2 and r1 distance away from the centre of the earth

31.

The fractional change in the value of free fall acceleration for particle when it is lifted from the surface to an elevation h (h<<r) is

a)

H/r

b)

-(2h/r)

c)

2h/r

d)

None of these

32.

Yah particle hanging from a spring stretcher seat to buy one centimetre and earth surface radius of the earth is 6400 km place 800 kilometre above the Earth surface the same particle will stage the spring by

a)

1cm

b)

8cm

c)

0.1cm

d)

0.79cm

33.

What height above the Earth surface the value of the g becomes g/2

a)

(√2-1) r

b)

√2r

c)

(√2+1) r

d)

R√2

34.

The mass of the moon is 1 /8 of the year but the gravitational police 1 /6 of the earth It is due to the fact that

a)

Moon is the statellight of the earth

b)

The radius of the earth is 8/6 of the moon

c)

TThe radius of the earth is (√8/6 of the moon

d)

TThe radius of the moon is (6/8) of the earth

35.

Yes don't wait 100 n on the surface of the earth the ratio of its weight at the height of the radius of the earth to depth of half the radius of the earth will be approximately

a)

3.6

b)

2.2

c)

1.8

d)

0.9

36.

A system of four particles is placed at the vertices of a square of side l the potential at the centre of the square is

a)

-3√2/2 GM/l

b)

-3√2 GM/l

c)

-4√2Gm/l

d)

-2√3 Gm /l

37.

Infinite number of body seach of mass 6 kg or situated at distance 1 m2m4m ATM respectively on why as is from the origin the resultant gravitational field intensity at the origin is

a)

4G

b)

8G

c)

9G

d)

12G

38.

The force between your Hollow sir and a point mass at P inside it as shown in the figure is

a)

Attractive constant

b)

Attractive and depends on the position of the point with respect to centre c

c)

0

d)

Repulsive and constant

39.

Mars as a diameter of approximately 0.5 that of earth and a mass of 0.1 that of years does our face gravitational field strength on Mars compared with that on Earth is Greater by a factor of

a)

0.1

b)

0.2

c)

0.4

d)

2.0

40.

A uniform spherical shell gradually shrinks maintaining each shape the gravitational potential at the centre

a)

Increases

b)

Decreases

c)

Remains constant

d)

Oscillates

41.

The gravitational potential difference between the surface of a Planet and the appoint 20 m above the surface is To Rule By Kg if the gravitational field is uniform then work done in carrying a 5 kg body to height of above the surface is

a)

2j

b)

20j

c)

40j

d)

10j

42.

The ratio of the radius of the earth to that of moon is 10 the ratio of acceleration due to gravity on earth and on moon is 6 the ratio of the escape velocity from the surface of earth to that from the moon is

a)

10

b)

Nearly 5

c)

Nearly 8

d)

1.66

43.

The rocket is fired with a speed of 5.6 km from the Earth surface how far from the Earth surface does the rocket go before returning to the earth

a)

R/4

b)

R/3

c)

R/2

d)

4r/3

44.

X and York 2 points at respective distance or and two hour from the centre of the earth Where are is greater than the radius of earth gravitational potential at Axis 800 kg when a 1 kg mass is taken from x to Y the work done on the Mass is

a)

400kj

b)

200kj

c)

-200kj

d)

80kj

45.

The gravitational potential difference between a point at the surface of a certain planet and the point 10 m above the surface is 4.0 jkg assuming the gravitational field is uniform there in moving a mass of 2.0 kg from the surface 2 year 0.5.0 above the surface is

a)

0.16

b)

1.0

c)

4.0

d)

2.0