Physics - Modern Physics Question with Solution | TestHub

A particle of mass $m$ is moving in a circular orbit under the influence of the central force $F(r)=-kr$, corresponding to the potential energy $V(r)=k{r}^2/2$, where $k$ is a positive force constant and $r$ is the radial distance from the origin. According to the Bohr's quantization rule, the angular momentum of the particle is given by $L=n\hslash$, where $\hslash =h/(2\pi ),h$ is the Planck's constant, and $n$ a positive integer. If $v$ and $E$ are the speed and total energy of the particle, respectively, then which of the following expression(s) is(are) correct?