Physics · 2022
JEE Main · 29 July 2022, Shift 2 · Q49
The root mean square speed of smoke particles of mass 5 × 10^-17 kg in their Brownian motion in air at NTP is approximately. [Given k =1.38 × 10^-23…
The root mean square speed of smoke particles of mass $\displaystyle 5 \times 10^{-17} \mathrm{~kg}$ in their Brownian motion in air at NTP is approximately. [Given $\displaystyle \mathrm{k}=1.38 \times 10^{-23} \mathrm{JK}^{-1}$ ]
Official answer
(3)
$\displaystyle 15 \mathrm{~mm} \mathrm{~s}^{-1}$
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JEE Main 2022 Physics question, with the answer from NTA’s final answer key. Where our answers come from.