If R is the radius of the earth and g is the acceleration due to gravity

⇦

⇨

If R is the radius of the earth and g is the acceleration due to gravity on the earth surface, the mean density of the earth is

Options

(a) 4πG/3gR
(b) 3πG/4gR
(c) 3g/4πRG
(d)πRg/12G

Correct Answer:

3g/4πRG

Explanation:

Density = Mass/ Volume

= M / (4/3 π R³)

= (gR² / G). x 3/4  (1/π R³) [as g = GM/R²]

= (3/4π G) x (g/R)

=3g/4πRG

Related Questions:

1. A magnifying glass of focal length 5 cm is used to view an object by a person
2. The rest mass of a body is m1. It moves with a velocity of 0.6c, then its relativistic
3. Which one of the following bonds produces a solid that reflects light in the visible region
4. In Young’s double slit experiment, the locus of the point P lying in a plane
5. ln a surrounding medium of temperature 10⁰C a body takes 7 min for a fall

Question Type: Apply (15)
Difficulty Level: Easy (1008)
Topics: Gravitation (63)
Subject: Physics (2479)

---

Important MCQs Based on Medical Entrance Examinations To Improve Your NEET Score

18000+ students are using NEETLab to improve their score. What about you?

Solve Previous Year MCQs, Mock Tests, Topicwise Practice Tests, Identify Weak Topics, Formula Flash cards and much more is available in NEETLab Android App to improve your NEET score.

---

Share this page with your friends