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  • How many revolutions does an electron complete in one second in the first orbit of hydrogen atom?  Option: 1 <img alt="675\times 10^{15}"

How many revolutions does an electron complete in one second in the first orbit of hydrogen atom?
 

Option: 1

675\times 10^{15}
 


Option: 2

100


Option: 3

1000


Option: 4

1


Answers (1)

best_answer

\mathrm{\text { By using } f_n =\frac{4 \pi k^2 z^2 e^4 m}{n^3 h^3} }

\mathrm{\therefore \quad f_1 =\frac{12.56 \times 81 \times 10^{18} \times\left(1.6 \times 10^{-19}\right)^4 \times 9.1 \times 10^{-31}}{\left(6.62 \times 10^{-34}\right)^3} }

\mathrm{ =657 \times 10^{15} \mathrm{rev} / \mathrm{s}}

Hence option 1 is correct.

 

Posted by

Suraj Bhandari

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