11)

While considering the motion of an object under the gravitational force of another object which of the following quantities are not conserved.

Class 11 Physics

A)

Linear momentum

B)

Total mechanical energy

C)

Angular momentum

D)

Both a and b

12)

Angular momentum conservation leads to

Class 11 Physics

A)

Kepler’s second law

B)

Kepler’s first law

C)

Law of gravitation

D)

Kepler’s third law

13)

An astronaut experiences weightlessness in a space satellite because

Class 11 Physics

A)

Both a and b

B)

Both astronaut and satellite are not in free fall towards the earth

C)

Both astronaut and satellite are in free fall towards the earth

D)

None

14)

The gravitational potential energy associated with two particles separated by distance r is given by

Class 11 Physics

A)

V = Gm1 m2 / r2

B)

V = + G m1 m2/ r

C)

V = – G m1 m2/r

D)

None

15)

The gravitational force on a particle inside a spherical shell is

Class 11 Physics

A)

Zero

B)

Positive

C)

Negative

D)

None

16)

Gravitational shielding is

Class 11 Physics

A)

Both a and b

B)

Not possible

C)

Possible

D)

None

17)

All planets move in an elliptical orbits with the sun situated at one of the foci, is called as

Class 11 Physics

A)

Law of orbits

B)

Law of periods

C)

Law of areas

D)

Law of gravitation

18)

The line which joins any planet to the sun sweeps out equal area in equal interval of time, this is called as

Class 11 Physics

A)

Law of orbits

B)

Law of periods

C)

Law of areas

D)

Law of gravitation

19)

The square of time period of revolution of a planet is proportional to the cube of the semi major axis of the ellipse traced out by the planet, this is called as

Class 11 Physics

A)

Law of orbits

B)

Law of periods

C)

Law of areas

D)

Law of gravitation

20)

The time period of revolution of earth around the sun in years is

Class 11 Physics

A)

1

B)

1.88

C)

0.24

D)

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