Physics · 2013
JEE Main · 9 April 2013, Shift 1 · Q25
From the following, the quantity (constructed from the basic constants of nature), that has the dimensions, as well as correct order of magnitude,…
From the following, the quantity (constructed from the basic constants of nature), that has the dimensions, as well as correct order of magnitude, vis-a-vis typical atomic size, is :
Official answer
(2)
$\displaystyle \frac{4 \pi \varepsilon_0 \hbar^2}{m e^2}$
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JEE Main 2013 Physics question, with the answer from NTA’s final answer key. Where our answers come from.