If the velocity of the revolving electron of{He}^{+} in the first orbit ({n}=1) is {v}, the velocity of the electron in the second orbit is :

KVPY 2020-21 SB SX Exam Previous Papers

Question : 60 of 120

Marks: +1, -0

If the velocity of the revolving electron of

{He}^{+}

in the first orbit

({n}=1)

{v}

, the velocity of the electron in the second orbit is :

Solution:

For single electron species

v_{n} \∝ {1}/{n}

{v_{2}}/{v_{1}}={n_{1}}/{n_{2}}={1}/{2}

v_{2}={1}/{2} v_{1}={1}/{2} v={v}/{2}=0.5 v

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