Physics · 2022
JEE Main · 28 June 2022, Shift 1 · Q35
Two planets A and B of equal mass are having their period of revolutions T_A and T_B such that T_A =2 T_B. These planets are revolving in the…
Two planets A and B of equal mass are having their period of revolutions $\displaystyle \mathrm{T}_{\mathrm{A}}$ and $\displaystyle \mathrm{T}_{\mathrm{B}}$ such that $\displaystyle \mathrm{T}_{\mathrm{A}}=2 \mathrm{~T}_{\mathrm{B}}$. These planets are revolving in the circular orbits of radii $\displaystyle \mathrm{r}_{\mathrm{A}}$ and $\displaystyle \mathrm{r}_{\mathrm{B}}$ respectively. Which out of the following would be the correct relationship of their orbits?
Official answer
(3)
$\displaystyle \mathrm{r}_{\mathrm{A}}^3=4 \mathrm{r}_{\mathrm{B}}^3$
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.