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The acceleration due to gravity near the surface of a planet of radius R and density d is proportional to
Options
(a) d/R²
(b) dR²
(c) dR
(d) d/R
Correct Answer:
dR
Explanation:
g=GM/R²
(M=Mass of the earth); (R=Distance of body from centre of earth)
g=G Volume x density / R²
Volume of the sphere=4/3 πR³
Therefore, g=G.4/3 πR³.d / R²
g=G 4/3 πRd
g=4πG/3.dR
g is proportional to dR
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Topics: Gravitation
(63)
Subject: Physics
(2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
- For a thermocouple, the neutral temperature is 270⁰C when its cold junction is at 20⁰C.
- A solenoid of length l metre has self inductance L henry. If number of turns
- In an L-C-R series resonant circuit, the capacitance is changed from C to 4C.
- A filament bulb (500W,100V) is to be used in a 230V main supply. When a resistance
- A radioactive element forms its own isotope after 3 consecutive disintegrations.
Topics: Gravitation (63)
Subject: Physics (2479)
Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score
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