Acceleration Due to Gravity and its Variation With Altitude and Depth NEET Questions

Physics - Gravitation

Acceleration Due to Gravity and its Variation With Altitude and Depth MCQ Questions


13.
If the Earth's mass doubled but its radius remained the same, g on the surface would:
A.
Halve
B.
Remain the same
C.
Double
D.
Become four times
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ANSWER :
C. Double
14.
If both the mass and radius of the Earth were to be doubled, the value of g on the surface would:
A.
Become half
B.
Remain the same
C.
Become double
D.
Become four times
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ANSWER :
A. Become half
15.
The acceleration due to gravity at a height of 1 km above the Earth's surface is the same as at a depth d below the surface. Then: d =

NEET - 2017

A.
0.5 km
B.
1 km
C.
2 km
D.
4 km
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ANSWER :
C. 2 km
16.
In terms of mean density ρ of the Earth and its radius R, the surface gravity is:
A.
g = (4/3) Ο€ G ρ R
B.
g = (4/3) Ο€ G ρ RΒ²
C.
g = G ρ R
D.
g = Ο€ G ρ RΒ³
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ANSWER :
A. g = (4/3) Ο€ G ρ R
17.
Two planets have the same surface gravity g. Planet A has twice the radius of planet B. The ratio of their masses M_A : M_B is:
A.
1 : 1
B.
2 : 1
C.
4 : 1
D.
1 : 2
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ANSWER :
C. 4 : 1
18.
The acceleration due to gravity decreases with altitude as:

NEET - 2019

A.
Linearly
B.
Exponentially
C.
Quadratically
D.
None of these
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ANSWER :
C. Quadratically