Physics · 2019
JEE Main · 12 April 2019, Shift 2 · Q1
The number density of molecules of a gas depends on their distance r from the origin as, n ( r )= n_0 e^-α r^4. Then the total number of molecules is…
The number density of molecules of a gas depends on their distance $\displaystyle r$ from the origin as, $\displaystyle \mathrm{n}(\mathrm{r})=\mathrm{n}_0 \mathrm{e}^{-\alpha \mathrm{r}^4}$. Then the total number of molecules is proportional to :
Official answer
(3)
$\displaystyle \mathrm{n}_0 \alpha^{-3 / 4}$
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JEE Main 2019 Physics question, with the answer from NTA’s final answer key. Where our answers come from.