In a hypothetical system a particle of mass m and charge -3q is moving around a very heavy particle having charge q. Assuming Bohr's model to be time to this system, the orbital velocity of mass m when it is nearest to heavy particle is

\frac{3 q^{2}}{2 ϵ_{0} h}

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\frac{3 q^{2}}{4 ϵ_{0} h}

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\frac{3 q}{2 ϵ_{0} h}

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\frac{3 q}{4 ϵ_{0} h}

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