Kepler’s Law of Planetary Motion NEET Questions

Physics - Gravitation

Kepler’s Law of Planetary Motion MCQ Questions


13.
The square of the time period of revolution of a planet is proportional to the cube of the semi-major axis of its orbit. This is:

NEET - 2023

A.
Kepler’s first law
B.
Kepler’s second law
C.
Kepler’s third law
D.
Newton’s law of gravitation
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ANSWER :
C. Kepler’s third law
14.
The shape of a planet’s orbit according to Kepler’s First Law is:
A.
Circular
B.
Elliptical
C.
Parabolic
D.
Hyperbolic
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ANSWER :
B. Elliptical
15.
When a planet is at its perihelion, its orbital speed is:
A.
Maximum
B.
Minimum
C.
Zero
D.
Constant
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ANSWER :
A. Maximum
16.
If the semi-major axis of a planet’s orbit is doubled, its time period will:

NEET - 2019

A.
Remain the same
B.
Double
C.
Increase by a factor of 2.8
D.
Increase by a factor of 4
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ANSWER :
C. Increase by a factor of 2.8
17.
Kepler's Second Law is a consequence of the conservation of:
A.
Energy
B.
Angular momentum
C.
Linear momentum
D.
Mass
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ANSWER :
B. Angular momentum
18.
If the orbital period of a planet is 8 years, according to Kepler’s Third Law, the semi-major axis of its orbit is:
A.
4 AU
B.
8 AU
C.
2 AU
D.
16 AU
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ANSWER :
A. 4 AU