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JEE PHYSICS MCQ: GRAVITATION

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The radius of the earth is

6.37 \times 10^6 \mathrm{~m}

, its mean density is

5.5 \times 10^3 \mathrm{~kg} \mathrm{~m}^{-3}

and

G=6.66 \times 10^{-11}\mathrm{~Nm}^2 \mathrm{~kg}^{-2}

. Determine the gravitational potential on the surface of the earth.

View answer and explanation

Correct option: A

-6.22 \times 10^7 \mathrm{~J} \mathrm{~kg}^{-1}

Option A (

\frac{2}{1}

) is correct because using the ideal gas law, the ratio of the number of gas molecules in A to B is 2:1.

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