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CBSE

Subject

Physics

NEET Physics : Gravitation

Multiple Choice Questions

101.

The radius of orbit of a planet is two times that of the earth. The time period of the planet is :

4.2 T
2.8 T
5.6 T
8.4 T

102.

The distance between the sun and the earth be r then the angular momentum of the earth around the sun is proportional to :

$\sqrt{r}$
$r^{3 / 2}$
r
none of these

103.

The radius of orbit of satellite of earth is R. Its kinetic energy is proportional to :

$\frac{1}{R}$
$\frac{1}{\sqrt{R}}$
R
$\frac{1}{R^{3 / 2}}$

104.

A body falls from a height h = 200 m. The ratio of distance travelled in each 2 sec, during t = 0 to t = 6 second of the journey is

1 : 4 : 9
1 : 2 : 4
1 : 3 : 5
1 : 2 : 3

105.

According to Kepler's law, the time period of a satellite varies with its radius are as:

T² ∝ R³
T³ ∝ R²
$T^{2} \propto \frac{1}{R^{3}}$
$T^{3} \propto \frac{1}{R^{2}}$

106.

The length of the second's pendulum is 1 m on earth. If the mass and diameter of a planet are doubled than that of earth. Then its length becomes

1 m
2 m
0.5 m
4 m

107.

Acceleration due to gravity:

decreases from the equator to poles
decreases from poles to the equator
is maximum at the centre of the earth
is maximum at the equator

108.

Two satellites A and B go around a planet P in circular orbits having radius 4 R and R respectively. If the speed of satellite A is 3v, then the speed of satellite B will be

6v
9v
3v
none of these

109.

The period of oscillation of a simple pendulum of constant length at the surface of the earth is T. Its time period inside a mine will be :

can not be compared
equal to T
less than T
more than T

110.

A particle falls towards earth from infinity. Its velocity on reaching the earth would be:

infinity
$\sqrt{2 gR}$
$2 \sqrt{gR}$
zero

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