# IIT JEE/IIT JEE Gravitation part1 Sample Test,Sample questions

1.5R / 3

2.R / 3

3.2R / 3

4.R / 3

1.40 kg

2.5 kg

3.infinite

4.zero

1.200 g wt

2.400 g wt

3.50 g wt

4.300 g wt

1.1 cm

2.2 cm

3.3 cm

4.4 cm

## Question: `A planet has radius and mass both half of those of the earth then the value of g on that planet will be:`

1.4.9 m/second square

2.9.8 m/second square

3.19.6 m/second square

4.13.8 m/second square

1.R / 2

2.R / 4

3.R / 8

4.R / 64

1.zero

2.98 N

3.49 N

4.none of these

1.0.50%

2.1.50%

3.1%

## Question: `A satellite is orbiting very close to a planet. Its time period depends only upon`

1.density of the planet

2.mass of the planet

4.mass of the satellite

## Question: `A satellite is orbiting very close to planet. Its time period depends only upon:`

1.density of the planet

2.mass of the planet

4.mass of the satellite

## Question: `A satellite revolving around the Earth loses some energy due to collision. What would be the effect on its velocity and distance from the centre of the Earth ?`

1.Velocity increases and distance decreases

2.Both velocity and distance increase

3.Both velocity and distance decrease

4.Velocity decreases and distance increases

## Question: `A satellite S is moving in an elliptical orbit around the earth. The mass of the satellite is very small compared to the mass of the earth:`

1.the angular momentum of S about

2.the centre of the earth changes in direction but its magnitude remains constant

3.the total mechanical energy of S varies periodically with time

4.the linear momentum of S remains constant in the magnitude

## Question: `An artificial satellite of the earth releases a packet. If air resistance is neglected the point where the packet will hit will be:`

2.exactly below

3.behind

4.it will never reach the earth

## Question: `Average density of the earth:`

1.does not depend on g

2.is a complex function of g

3.is directly proportional to g

4.is inversely proportional to g

## Question: `Consider the earth to be a homogeneous sphere. Scientist A goes deep down in a mine an scientist B goes high up in a balloon. The gravitational field measured by:`

1.A goes on decreasing and that by B goes on increasinG

2.B goes on decreasing and that by A goes on increasing

3.each remains unchanged

4.each goes on decreasing

1.5R

2.6R

3.7R

4.8R

1.25h

2.10h

3.9h

4.5h

## Question: `How the gravitational constant will change if a brass plate is introduced between two bodies?`

1.No change

2.Decreases

3.Increases

4.No sufficient data

1.2R

2.R/2

3.R

4.R/4

1.1%

2.1.50%

3.2%

4.2.50%

## Question: `If earth were to rotate faster than its present speed the weight of an object will:`

1.increase at the equator but remain unchanged at poles

2.decrease at the equator but remain unchanged at the poles

3.remain unchanged at the equator but decrease at the poles

4.remain unchanged at the equator but increase at the poles

1.1000 mile / h

2.2000 mile / h

3.3000 mile / h

4.4000 mile / h

## Question: `If suddenly the gravitational force of attraction between earth and a satellite revolving around it becomes zero then the satellite will:`

1.continue to move in its orbit with same velocity

2.move tangentially to the original

3.orbit with the same velocity

4.become stationary in its orbit

1.64.5

2.129

3.182.5

4.730

## Question: `If the earth stops rotating about its axis the acceleration due to gravity will remain unchanged at:`

1.equator

2.latitude 45 degree

3.latitude 60 degree

4.poles

## Question: `If the mass of a 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`

1.5 / 8 times that on the surface of the Earth

2.3 / 4 times that on the surface of the Earth

3.1 / 2 times that on the surface of the Earth

4.9 / 10 times that on the surface of the Earth

## Question: `If the radius of earth decreases by 10% the mass remaining unchanged what will happen to the acceleration due to gravity?`

1.Decreases by 19%

2.Increases by 19%

3.Decreases by more than 19%

4.Increases by more than 19%

1.increase by 4%

2.increase by 2%

3.decrease by 4%

4.decrease by 2%

## Question: `If the speed of a satellite moving around a planet is increased by 41.4% it will:`

1.move in an orbit of greater radius

2.move in an orbit of lesser radius

3.fall into the planet

4.escape from the planet

## Question: `In case of earth:`

1.field is zero both at centre and infinity

2.potential is zero but at centre and infinity

3.potential is same both at centre and infinity but not zero

4.potential is minimum at the centre

1.40 J

2.-40 J

3.zero

4.+10 J

1.4 km/s

2.8 km/s

3.2 km/s

4.6 km/s

## Question: `Inside a uniform spherical shell:`

1.potential is zero

2.field is zero

3.potential is constant

4.both B and C

## Question: `Keplers II law is a consequence of:`

1.conservation of energy

2.conservation of linear momentum

3.conservation of angular momentum

4.none of the above

## Question: `Mark correct option or options.`

1.Only equatorial orbit are stable for a satellite

2.Escape velocity does not depend upon angle of projection

3.A communication satellite rotates in a direction from west to east

4.All of the above

## Question: `Mass remaining constant the radius of the Earth shrinks by 1% .The acceleration due to gravity on the earths surface would`

1.increase by 2%

2.increase by 1%

3.decrease by 1%

4.decrease by 1 / 2%.

## Question: `Orbital velocity of satellite revolving in a circular path close to the planet`

1.is directly proportional to the density of planet

2.is directly proportional to the square root of density of planet

3.is directly proportional to square of density of planet

4.is inversely proportional to square root of density of planet

1.GMm / r

2.GMm / 2r

3.GMm / r

4.GMm / 2r

1.3:01

2.1:03

3.1:01

4.1 / 3 : 1

1.E

2.E/2

3.E/3

4.E/4

1.11.2 km/s

2.1.112 km/s

3.15.8 km/s

4.22.4 km/s

1.11.1 J

2.5.55 J

3.16 J

4.27.7 J

1.3mgR

2.5/6 mgR

3.2mgR

4.1/5mgR

## Question: `The radius of the earth shrinks by 1%. The acceleration due to gravity on the earths surface would: (mass remaining constant)`

1.increase by 2%

2.increase by 1%

3.decrease by 1%

4.decrease by 0.5%

1.1:01

2.8:01

3.4:01

4.2:03

1.2R

2.3R

3.4R

4.5R

1.10h

2.80h

3.40h

4.20h

1.zero

2.infinite

3.less than zero

4.none of these

## Question: `The time period of an earths satellite in circular orbit is independent of:`

1.the mass of the satellite

3.both the mass and radius of the orbit

4.neither the mass of the satellite nor the radius of its orbit

1.2R

2.3R

3.4R

4.5R

## Question: `Two earths satellites are revolving in the same circular orbit round the centre of the earth. They must have the same:`

1.mass

2.angular momentum

3.kinetic energy

4.velocity

1.2:01

2.1:02

3.3:01

4.2:03

1.8

2.4

3.2.8

4.4.2

1.2.5 R

2.4.5 R

3.7.5 R

4.1.5 R

## Question: `When a satellite going round the earth in a circular orbit of radius r and speed v loses some of its energy then r and v change as:`

1.r and v both will increase

2.r and v both will decrease

3.r will decrease and v will increase

4.r will increase and v will decrease

## Question: `When a satellite going round the earth in a circular orbit of radius r and speed v loses some of its energy then r and v change as:`

1.r and v both will increase

2.r and v both will decrease

3.r will decrease and v will increase

4.r will increase and v will decrease

1.downward

2.upward

3.sideways

4.nil

## More MCQS

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