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WB JEE 2016
MCQ (Single Correct Answer)
+2
-0.5
The time taken for an electron to complete one revolution in Bohr orbit of hydrogen atom is
A
$${{4{m^2}\pi {r^2}} \over {{n^2}{h^2}}}$$
B
$${{{n^2}{h^2}} \over {4m{r^2}}}$$
C
$${{4{\pi ^2}m{r^2}} \over {nh}}$$
D
$${{nh} \over {4{\pi ^2}m{r^2}}}$$
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