Kinetic energy of the electron in an orbit of radius r is proportional to

1. A.
   $\dfrac{e^2}{2r^2}$
2. B.
   $\dfrac{e^2}{r}$
3. C.
   $\dfrac{e^2}{2r}$
4. D.
   $\dfrac{e^2}{r^2}$

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1. A.
   $\dfrac{e^2}{2r^2}$
2. B.
   $\dfrac{e^2}{r^2}$
3. C.
   $\dfrac{e^2}{2r}$
4. D.
   $\dfrac{e^2}{4r}$

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