The mass density of a.. | Gravitation |JEE _MAIN

JEE MAIN 2020

02-09-20 S1

Question

The mass density of a spherical galaxy varies as $\frac{\mathrm{K}}{\mathrm{r}}$ over a large distance ' r ' from its centre. In that region, a small star is in a circular orbit of radius $R$. Then the period of revolution, $T$ depends on $R$ as

Select the correct option:

$T^2 \propto \frac{1}{R^3}$

$\mathrm{T}^2 \propto \mathrm{R}$

$T \propto R$

$\mathrm{T}^2 \propto \mathrm{R}^3$

✓ Correct! Well done.

✗ Incorrect. Try again or view the solution.

Solution

Question Tags

JEE Main

Physics

Hard

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