Physics GK 06 - Gravitation

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1).
Which of the following is true about universal gravitational constant in the case of two bodies each of unit mass having their centres placed at unit distance apart?
2).
Which of the following laws state that the orbits of the planets are ellipses, with the Sun at one focus of the ellipse?
3).
Kepler's second law is also known as:
4).
As per the Kepler's third law, the square of the time period of revolution of a planet is directly proportional to which of the following?
5).
Which of the following represents the dimensional formula of Universal Gravitational Constant?
6).
The Universal Gravitational Constant for two bodies is dependent on which of the following?
7).
Which of the following is incorrect:
8).
What is the SI unit of acceleration due to gravity?
9).
What is the value of acceleration due to gravity at the centre of the earth?
10).
Which of the following is correct about acceleration due to gravity?
11).
Which of the following is true about the effect of altitude on the value of acceleration due to gravity?
12).
Which of the following statements is correct?
13).
The value of acceleration due to gravity is minimum on which of these planets?
14).
What is the unit of intensity of Gravitational field in the c.g.s system?
15).
What is the dimensional formula of Gravitational Potential?
16).
What will be the effect on the value of acceleration due to gravity at the poles if the rate of rotation of earth increases?
17).
At sea level, what is the difference between the value of acceleration due to gravity at the poles and at the equator?
18).
Which of the following statements is correct about the value of acceleration due to gravity (g) in a light and heavy falling body?
19).
What is the gravitational potential energy for infinite distance?
20).
Which of the following is correct about the value of acceleration due to gravity?
21).
In which of the following situations, the state of weightlessness can be observed?
22).
What will be the change in the force of attraction between two bodies if the distance between them is doubled?
23).
What is the value of Universal Gravitational Constant?
24).
On which of the following the gravitational force between two objects does not depend?
25).
Which of the following has an effect on the value of acceleration due to gravity?
26).
The ratio of the magnitude of the external force applied on a body to the magnitude of acceleration produced in its motion is known as:
27).
Choose the correct statement about weight:
28).
Which of the following is correct about Gravitational force?
29).
In comparison to the gravitational force the earth exerts on the moon, the gravitational force the moon exerts on earth ________?
30).
The acceleration due to gravity on any planet does not depend on which of the following?
1. Which of the following is true about universal gravitational constant in the case of two bodies each of unit mass having their centres placed at unit distance apart?
[A] It is equal to the force of attraction between them
[B] It is equal to twice the force of attraction between them
[C] It is equal to half the force of attraction between them
[D] It is equal to ten times the force of attraction between them
2. Which of the following laws state that the orbits of the planets are ellipses, with the Sun at one focus of the ellipse?
[A] Kepler’s First law
[B] Kepler’s Second law
[C] Kepler’s Third law
[D] None of the above
3. Kepler’s second law is also known as:
[A] Law of periods
[B] Law of areas
[C] Law of orbits
[D] Law of Planets
4. As per the Kepler’s third law, the square of the time period of revolution of a planet is directly proportional to which of the following?
[A] semi-major axis of its elliptical orbit
[B] cube root of semi-major axis of its elliptical orbit
[C] square of semi-major axis of its elliptical orbit
[D] cube of semi-major axis of its elliptical orbit
5. Which of the following represents the dimensional formula of Universal Gravitational Constant?
[A] M1 L2 T-2
[B] M-1 L1 T-2
[C] M-1 L3 T-2
[D] M1 L3 T-2
6. The Universal Gravitational Constant for two bodies is dependent on which of the following?
[A] Nature of the bodies
[B] Size of the bodies
[C] Nature of medium between the bodies
[D] None of the above
7. Which of the following is incorrect:
[A] Gravitational force of attraction is independent of nature of intervening medium
[B] Gravitational forces are central forces
[C] Gravitational forces are non-conservative forces
[D] All of the above
8. What is the SI unit of acceleration due to gravity?
[A] ms-2
[B] ms-3
[C] Kgms-2
[D] ms-1
9. What is the value of acceleration due to gravity at the centre of the earth?
[A] 1 N/kg
[B] 0
[C] -9.8 N/kg
[D] 9.8 N/kg
10. Which of the following is correct about acceleration due to gravity?
[A] it increases with depth
[B] it decreases with depth
[C] it is independent of depth
[D] None of the above
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