Physics

Problem

From the following combinations of physical constants (expressed through their usual symbols) the only combination, that would have the same value in different systems of units, is: [Main Online April 12, 2014] a.

\frac{ch}{2\pi\epsilon_0^2}

\frac{e^2}{2\pi\epsilon_0 G m_e^2}

(

m_e

= mass of electron) c.

\frac{\mu_0 \epsilon_0}{c^2} \frac{G}{he^2}

\frac{2\pi\sqrt{\mu_0 \epsilon_0}}{ce^2} \frac{h}{G}

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